If you have chronic depression, chronic social anxiety, difficulty adjusting to new places etc etc , it's irrelevant.
Everyone in life has to create their own life, social life, career, and work on themselves.
The university is just a building where you learn stuff.
When I first started uni, I joined no societies, and made no friends.
But in this week alone I have socialised with more people than ever and had the best experience yet, and enjoyed every minute, and I have learnt a lot from this.