many platform companies probably do not want to verify that a user is real, except in certain niche cases, as bots help them pump their numbers.

The ad companies I think would want the opposite

If they cannot distinguish real people from bots they can just charge more for more ads shown !

Indeed a lot of social media platforms are used by foreign powers to create discord. Human psychology is much more attentive to negative messages and this is too easy to weaponize. A solution against that would probably be world changing. It would have to preserve anonymity still of course.

That's why recaptcha is now doing human verification via mobile phone QR scan