Last Y/A question: Why are there now so many wrestling fans that are WWE loyal and won't vary in the wrestling they watch?

Good question. I think it's a combination of factors now. The simple answer is for the casual fan, there's nothing there to really attract them. Lets go into why

I think the product on offer is a major part of it. WWE and AEW have failed to create that true mainstream star that is needed in wrestling. I know Austin and Hogan were once in a generation star but no one has come close to having that sort of mainstream appeal, not even Cena. The product is also not interesting. When was the last time you honestly had a PPV Coming up where you had to watch it. Or you were watching an episode of Raw and you wanted to chat to someone about it after. The last storyline that had me really really gripped was the Cena Punk MITB feud.

AEW has started well but again, there is no real long term story that grips you. The booking most of the time feels like filler.

I also think WWE is trying to cater to everyone and only capturing a quarter of the audience they could get in each demographic. If they want the 18-30+ demographic then change the show to appeal and get the full audience. For that they need to make it more adult orientated. If they want the kid market, commit to it and kill the 3 hour Raw because that's too long to keep a kid watching.

WWE has got complacent as they had the whole audience and they stupidly believe the business is cyclical. It's a self inflicted down turn.

However the way tv is consumed has changed and now people have more choice than ever before. Any wrestling promotion will use this a reason, i say its an excuse. They need to adapt with the times and make shows binge worthy. For me, the first way is to reduce the show lengths or at least make each hour different enough that it feels like you are watching 3 different shows. The tried and tested formula is failing now.

They just aren't worth watching.  AEW is TNA with wCw budget, TNA doesn't exist and NJPW is like watching people from the 50s figure out the 90s happened.

My guess would be familiarity and fear of the unknown. When I was little I watched WWF because my Dad watched WWF and we did not often watch WCW or ECW because my Dad watched WWF. My brothers got really into ECW because of kids at school, so my stubborn Dad gave it a chance. He didn't like it at first, because it was so different from what he was used to with WWF. 

I haven't watched WWE regularly since that Royal Rumble when Daniel Bryan should have won (you know the one). So it's been a few years. But if I tuned in today, I pretty much know what to expect (with the exception of the Thunderdome thing or whatever). I know what I am going to get. No offence to any manly men out there, but it's like watching a Soap Opera. I could tune into an episode of General Hospital or Young and the Restless today, and know what's going on because of the familiarity and the characters. I understand the basic premise of the show and the characters have longevity like WWE. 

Trying AEW would be different because everyone is essentially playing a different character (although the concept of wrestling like soap operas have the same premise) and there are new / different characters it is a little bit of a different formula. I think that's what keeps WWE loyalists watching WWE. They know what they're getting, they like what they're getting (more or less). I guess those people who just don't like trying new things are going to stick with what they know.  

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Everything is so weird and different on here now. I only get 10,000 characters to type too lol! 

I think the reason is there are a ton of tv shows to watch. WWE takes a big part of people's time. I think it's more of people not having the time to watch all their favorite shows and all of pro wrestling, more so than them been against other promotions. I think they would enjoy other companies if they took the time. Back then they weren't all these cool tv shows to watch(Especially when there was no internet of wifi), where people can binge watch a bunch of stuff on different networks. It could also be they are conditioned to think WWE is the best, and if they don't enjoy WWE, they think they won't enjoy the others either. 

It is sad.             

Hey man! Long time no see!

I think a big reason for it is because of familiarity.  As of now, there aren't many English speaking promotions that have been as visible as WWE over the past 20 years.  It's like going to a restaurant chain that only sells Pepsi.  If you like the restaurant, you'll go back and most likely drink a Pepsi product even if you liked other sodas.  Inevitably you grow a taste for it and decide it's better than Coke, despite not having a Coke in 20 years or branching out to try independently owned sodas like IBC or RC.  Tribalism just works that way sometimes, to the point that you can't argue or have a constructive conversation with someone despite their complaints about the product they champion so vehemently.  

Because the wrestling industry is dead in general. WWE is the only relevant company, and that's being kind because WWE is not relevant at all. They are only relevant in mainstream media when someone dies. No one knows what AEW or ROH or NJPW is except for the small fraction of """hardcore""" fans aka basement dwellers.

I guess that is what they grew up with and they never took the time to watch anything else? One benefit from Covid-19 for example was the fact that Ring of Honor has made available matches from their early years. I didn't start following Ring of Honor until 2006, so I can say I didn't see a lot of the early stuff that AJ Styles, Daniel Bryan, Cesaro, Samoa Joe, Jay Lethal, Lo Ki, Christopher Daniels, Frankie Kazarian, Austin Aries, Chris Saban, Kevin Owens, Sammy Zayn and so many others. I've been sent links now and then to shows from Independent Wrestling Shows featuring many of The Wrestlers I've seen in WWE, ROH, Impact Wrestling, AEW and other Promotions.