Not only that. They'd play/do something else as well.
Life goes on.
Work, kids, friends, hobbies, holidays, gigs, anti-Fascist protests, exciting encounters on Tinder... If you're playing GTA enough to know that none of these things exist then you're doing something wrong with your life, frankly. I hadn't played GTA in 5 months before Tuesday and my life was no better or worse without it. I didn't have the Internet for 2 of those because of a house move and yet the world kept turning. People find other things to do - hopefully some things more important. If you can't or lack the inate ability to do that, there are clinics in Switzerland that may help you.