It's because (imo) modern games kinda aren't fun and there's something nice about just loading up a game and playing - no cut-scenes, no tutorial, no microtransactions or season passes, no worrying if it'll run on your old computer, no need to make a new account and jump through 2fa hoops and checking for activation e-mails and accepting ToS you didn't read, no need to be online, no need to clear space for an 80gb install, no 4gb patch whenever you go to play, no two minute load times. You just get to start it up and play a game and have a good time.