Laurent
Not exactly, but it does make the extra password a bit like security theater.
The extra password is apparently not involved in the E2EE of your passwords. Proton can't read them.
The extra password is being used as a second level of authentication. Like 2FA, except that its just an additional thing you need to know.
The dumb thing IMO is that they describe the extra password as providing additional security for your passwords as compared to your email...but then they're willing to reset it based on answers to questions that anyone with access to your email could answer.
I suppose it does provide some level of additional security, but it seems like not much to me.