Your proton account is susceptible to the same problem if your password gets compromised and you don’t have a backup access method registered.
Nonsense. You don’t even have to use Google’s authenticator when setting up MFA. You can just scan the QR it gives you using any authenticator app. You can use Microsoft Authenticator, Duo Mobile, Lastpass, WatchGaurd, etc, etc
Your proton account is susceptible to the same problem if your password gets compromised and you don’t have a backup access method registered.