The problem is that there is too much single player content, like solo instances and you cant do most of the roulettes in a group.
And DF makes it easy to find a group
so people tend to keep to themselves because the game is more focused on lone wolves than friends.
which makes it hard to find friends.

Ive actually made most of my friends through my characters instagram page
and through PF. I tend to befriend goood players so I can do future content it relying on random blms eith their quick cast flare start rotations.