Keeping donovan out if he's injured and might further injure himself is not at all the same thing as "punting."
I'm pretty sure all of us agree, if Donovan is hurt and cannot be effective in the game and/or playing will extend or worsen the injury or increase the likelihood of another more serious injury, then he sits out. There's no discussion to be had there. We all agree on that point.
What 90%+ of us also agree on is that if the above is not the case then Donovan should play, even through some pain, even if it means he'll have a little pain in game 3 and 4.
If he's not running right, sit him. If it's more than a bruise that hurts a little and it needs rest in order to heal, sit him. If during practice the medical team thinks there is a concern and that playing could lead to a more serious injury and resting could mean recovery in time for game 3, sit him. Otherwise, players play. Donovan should play. All signs point to Donovan playing.
Should we have a discussion about what would happen in the NBA brought soccer balls to the game instead of basketballs? I mean that's how pointless this discussion is.