10 years ago it might have bugged me but in this day and age there's just too much at risk for these kids. If you're in the BCS championship series and skipping then yeah that's maybe selfish, team is trying to win an NC. But if you're in the Meineke Bowl and your school already got the money, why risk an injury?
I don't buy the school helped you get into this situation either, the schools are making millions annually off these kids, if school A didn't take the kid school B would have.
I guess the counter is if everyone sat out the bowl games would suck, but football doesn't have an NCAA tournament like basketball does so most of these teams are not competing for anything tangible in the bowl games.