If Covid should be "a wake up call" against a much more deadly virus, why haven't the markets that supposedly produced it been closed?

It is a wake up call, but let's be honest. People won't wake up and smell the cofee untill people start dropping off like flies. A measly 0,5 % death rate will not do.

COVID-19 isn't nearly as vicious and deadly as the Black Death but it'll likely get worse before it gets better because a lot of heroes didn't respect it.

It should be, but what do you want people to wake up to?  Everyone knows that any strain of any common virus could mutate into something really ugly, and everyone knows that it could happen at any time.  But what can anyone actually do about it?

Even if we could track every case of every type of communicable infection on the planet, it wouldn't help.  There are countless strains of countless viruses and bacteria on the planet, and any one of them could cross over to our species or mutate at any time without warning.  There's no way of knowing in advance which exact bug or when it will happen.  The only way to know is when it does happen.

The markets that produce virus outbreaks haven't been closed for the same reason they weren't closed when SARS broke out the first time.  The Chinese consider their disgusting food habits and backwards ways to be culturally important, and (unless someone is white) culture is a forbidden debate topic.