In democratic elections one voter has one vote. There are no bots, no persons with multiple accounts, no trolls, no denial of service, etc, etc.
Adds too much friction and scares away those who want anonymity.
KYC works for financial institutions because it's regulated across the board. And let me tell, it's a pain.
It's probably another product though :)
There's no way for social platforms to tell apart which anonymous users are "good" or "bad"...
KYC wouldn't help against state actors, which are the offenders with potential to cause most damage. They're the issuers of their national IDs in the first place, it's useless to verify their ID.
you're are not presenting a feasible solution.
you can easily verify who this account belongs to, you cannot verify easily that this is the only account I have.
which is the problem.
further complicated by irrational attitudes to official identity such as you see in america. have a fraud resistant national ID system? fuck no! we want to use an unsafe mechanism never built for this purpose and impossible to safe guard!
good luck with that