If you ask a question that gets deleted because nobody answered it, shouldn't you get the points back?

No.   It's not like the points here matter.  Why worry about something so trivial?

It don't cost any points to ask a question Bro and, if they delete the question its because the questions wasn't suitable, not because it didn't receive answers. They deduct 10 points. They give you 6 points if you give a BA. 

What points? Questions stopped costing 5 points each on December 16-19, 2019. That was not quite 6 months ago. 

I was under the impression that you did get your points back if the question was deleted because of no answers. I am not aware of any rule changes about that, of course I could be wrong, this is the right category to ask your question as the users who frequent this category will definitely know.

Questions are deleted because they break Yahoo's rules.  Breaking rules does not entitle you to a point refund.