While I tend to agree, it's a little like telling someone to just "find a better job"; it's not always so easy. Maybe some people are unfortunate enough to not have real friends, and shallow Facebook connections are all they have.
Even though the shallow connections take up time that could be spent forging more meaningful connections with those around them, not everyone is self-confident enough to go cold-turkey.
For this reason I'm basically stuck with Facebook, but I've unfollowed most of my friends, so this reduces the burden to some extent.