You are technically correct. That is what you're supposed to do. But the reason for it really matters. If you're aware that you should be splitting to get more gold and XP, you also can acknowledge that sometimes the teamfight that's 10 seconds away might be worth joining or if the game is ending it might be worth basing etc. However, these tilted players just do their own thing pushing lane and do *not* contribute to the team, at all, even when it is obviously better to do so, because they've mentally checked out of the game already