Most sites usually focus on growth and try to deal with the fringe "problems" .
By putting obligatory phone verification, it will severely limit the new users registration.It will curb some of the multies and make them a bit easier to find etc.
The issue is that any registration restriction will drive many new user away. This is a fringe forum,badmouthed by 99% of youtubers/twitch streamers/blizz forum/bnet chat.
Imagine a new user trying to figgure out wtf is this jsp, and then the site asking them to first verify with their actual phone number... I don't think that will go down well with manynew users trying to figgure out if they are even interested in this forum.

You can't just..put your passwords on a piece of paper? Or why do you need these extra steps?
I've never needed a recovery email and I've been a member over 20 years.