Yes and no. Depends on the bowl and what's at stake.
I'll start by saying that, while I don't agree with healthy players sitting out bowl games, I understand why some do it. To me, you're part of the team and if there's a game on the schedule, you owe it to your teammates to play.
It's unlikely they sit out if it's a playoff game. As nice as the bowls are, the goal is the cfp. If they're intending to go to the NFL, it's understandable that they may not want to risk major injury in a relatively meaningless bowl.
The cfp brings with it the chance to win a national championship, the other bowls don't.