The average person, when not allowed to use a convenient password manager, will either use the same password for every site or come up with a predictable pattern. Encouraging a password manager helps make sure they don't get destroyed completely when a blog they signed up on 5 years ago is hacked.
This is partly because so many things want an account now. I have over 500 passwords saved, it would be straight up impossible to remember unique strings for each site.
This is partly because so many things want an account now. I have over 500 passwords saved, it would be straight up impossible to remember unique strings for each site.