Writing a paper and dealing with the inane requests from three reviewers was already frustrating and stressful. Now you open up a never ending review process of random people making demands (“unless you do X follow up analysis, this is worthless”).
also you need to be able to say a paper/project is done and let yourself move on. If your job turns into “respond to feedback on every paper you’ve ever written, every day” you’ll never start anything new.
It’s one thing to optimize an abstract pursuit of knowledge, but you also gotta remember that you need this to be a job people are willing/able to do.
To put it another way, if it’s just a job to you, dealing with criticism is part of what you’re getting paid for anyway, same as everyone else. And if that’s still too much to ask, you can point the finger at the lack of research that isn’t profit-driven.
Peer reviewing is hard work. Give people a readily available shortcut for it, and some people, in some occassions will take it. Which may in turn force conferences to adopt policies forbidding posting on arXiv.
I don't know how this page organizes moderation, but I imagine there will be some kind of moderation like on most online discussion forums.
Remember all that hype around LK-99 room temp superconduction a few months back? The substantive scientific discussion would absolutely be drown out by curious laymen and/or grifters
And to be fair, few scientific news get even remotely near the attention that superconductivity announcement got.