Like the other commenter said - people recommend them for peace of mind so you don’t have to think about knowing a password for the 2653rd account you set up once and are never using again.

I’ve used Dashlane for years, personally, but I know people here will immediately shut that down for not being FOSS. Bitwarden is FOSS but requires some technical setup and has no redundancy.

Don’t get me wrong, I love self-hosting as much as the rest of us but I’m not trusting my server from 2013 with all my passwords to everything.