I feel like full power palm strikes are a good way to hyper extend your wrist. If they lean forward like they are slipping, or shooting, or throwing a punch, you might connect with the ends of your fingers first. It is so obvious that this could happen, even as much as people cutting their knuckles on teeth.
However, I know people who have cut their knuckles on teeth. No one has bent their fingers with palm strikes. Makes me think no one has thrown a straight palm strike in a fight. Now if you are slapping people and want to call it palm striking to sound cool, that is whatever.
If I were assaulting a weaker person, I might palm strike the chest because it would make me feel good.