Two more words: extremely rare. I get the sitting out thing, but you can get injured any time. There's nothing magically dangerous about a bowl game. Why not sit out once your team is 3-7 or out of title contention?Two words…
Jake, and Butt.
As for the bowl trip, it's not exactly the B1G title game, but it is a fun trip for the players and fans. Don't forget that these are still 18-23 year old guys. Most have probably never been to Nashville or Tampa or whatever bowl location it might be. They have a good time as a reward for the long season and get to hang out together one more time before the season ends.