[This question should be migrated to Psychology.SE]
In all seriousness though, it's probably because Game Identification questions were so polarising in the past; a lot of choice words, arguments, meta-discussions, chat logs, example questions, close/reopen votes and everything else were thrown into the mix, and it took a hell of a lot of people's time, sweat, internet quota, passion and tears to reach the state it's currently in.
Without going into the gory details, it was a complex, large ruling that had large ramifications for how the greater community runs the site to the point that -out of the 5 standardised 'off-topic' close reasons- we have one purely dedicated to Game Identification style questions.
So why do we still visit (and vote on) Game-Id questions? Because we're all (still) heavily invested in the outcome of these discussions. Both those for and against ITG questions click-through -just to be sure that it conforms to the standards we put in place- and if it does we upvote it whilst we're there.
(Either that or they're just really interesting questions)