Making new real friends as an adult in an entirely new place is really hard for many people in many places (including me), and hanging out with vague acquaintances doesn't hold much interest.
Totally agree that it's challenging to make new friends as an adult. I feel lucky if I make one new real friend every two years. But just cause it's hard doesn't make it impossible, and it's far more rewarding than internet-only friends... you can actually do things together, not just talk.