Do You Main One Side?

I see a lot of people that say “family main” or “victim main” and I really don’t get it. I play both sides equally and have been playing since launch and I feel like I would be missing out on so much not playing one side. If you do main one side or the other what caused you to do so? I’m not judging anyone I’m genuinely curious why some people don’t want to play one side at all. I’ll play victim if I’m looking to be scared by this game or I’ll play family if I’m looking to play a bit more competitively.

Edit: The answer was victim queues suck and that’s perfectly understandable