@rcombs FWIW, I've worked with those people (Borbala was my tech lead, then manager for ~2.5 years), and I genuinely believe they're trying to do the right thing here.
The bot problem on the internet is not well understood by the average user/developer, mostly because that's an area where "obscurity" is still part of the best strategies the defenders have, and also because the bad actors focus their efforts on just a few targets (Google, Meta, Twitter, etc.).
@rcombs the proposal does talk about the DRM aspects of this, and tries to propose solutions that mitigate that issue. I don't know whether they're appropriate solutions or not, whether they go far enough or not, etc. I think that would be a healthy debate.
Saying "user agents shouldn't do that" is basically saying it's fine for millions of users every month to get their bank accounts stolen, their personal information sold on black markets, etc. -- unless you have a magic solution.