The avenue for catching this is that the password manager’s autofill won’t work on the phishing site, and the user could notice that and catch that it’s a malicious domain
Obviously SSO-y stuff is _better_, but autofill seems important for helping to prevent this kind of scam. Doesn't prevent everything of course!
Since this attack happened despite Kurt using 1Password, I'm really not all that receptive to the idea that 1Password is a good answer to this problem.
We can always make mistakes of course. And yeah, sometimes we just haven't done something.
Whether that’s via a hotkey or not seems totally irrelevant.
By removing the expectation that my password manager is going to autofill something, I'm now making the conscious decision to always try to fill it myself.
This makes me think more about what I'm doing, and prevents me from making nearly as many mistakes. I don't let my guard down to let the tools do all the work for me. I have to think: ok, I'll autofill things now, realize that it isn't working, and then look more closely at why it wasn't working as I expected.
I won't just blindly copy/paste my credentials into the site because whoops, I think it might have worked previously.
Honestly it sounds like you are missing the point while simultaneously using a bad password manager.