Isn’t turning off auto enter exacerbating the problem?
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
Autofill doesn't always work for every site. So, now you're having to store in your mind where it works and where it doesn't. By disabling it, it forces you to go the extra step (command-shift-L) every time.
Yes. This is the problem with the "just use a password manager" answer to phishing-resistance. They can be a line of defense, situationally, but you have to have them configured just right, and if you're using phishing-resistant authentication you don't need that line of defense in the first place.