If my options are "give all my data to malicious corporations and their bots" or "wonder if the pathological liar I'm talking with is a bot" I'll stick with guessing about the liar. Proof of identity is a scam, not a solution.
We shouldn't abandon the entire idea of an internet where people can find information and speak to each other without being identified and monitored 100% of the time just because the companies who want us to be identified and monitored filled the web with bullshitting bots
Maybe you've already given up and no longer care about that freedom, but don't count on everyone else giving up theirs.
The internet does not provide anything close to anonymity and never really has. Even a simple IP address is enough to out the majority of users, when combined with fingerprinting, metadata tracing and the use of metadata from other users, there really is no possibility of hiding your identity from a determined attacker.
I would choose the opposite option personally, and would welcome it if this site for example allowed biometric identification and used that to weight comments. While I wouldn't want to force that on anyone I do think it's going to be necessary given the rise of LLMs.
If there's no possible way to hide your identity then as long as we're determined to identify humans and bots we already can. In truth, most people are able to hide their identity pretty well from most people most of the time. The government can pretty much always track down who you are if they feel like it. If you're using a cell phone apple and google can find out who you are. If you use windows Microsoft will have a pretty good idea of who you are, but the vast majority of websites can't get anything more identifying than an IP address and a user-agent unless you tell it to them without trying to correlate your traffic with other traffic. That's where browser fingerprinting comes in really, it tells them the same browser a person used to log in with their name and address at one website is using another website. That lets them make some educated guesses, but they can't be sure who is behind the screen and there are easy steps a person can take to make it even harder for them to guess.
The fact that anonymity on the internet isn't perfect doesn't make it useless. Giving that up because you're afraid of reading something a bot wrote seems crazy.
I'm not sure I share your concern about surveillance capitalism - that ship sailed long ago - you are stored in many nation-state and corporate databases under all the aliases, phone numbers, IPs you've ever used. I sincerely doubt your opsec has always been even near good enough to evade this surveillance, it's a little late to start worrying about it now, particularly when there are other concerns.
I'd be more concerned about billionaires spending on bots impersonating humans to sway elections in my local state than a nation state snooping on forum comments and linking them with something else.
Proof of identity is badly needed in order to use the online spaces we've come to know and trust, and time is running out.