Then it has to at least puncture the skin, but most of the damage can still be non-physical. Physicality is a part of hit points, but it isn't all of it like Saelorn is trying to make it out to be. No edition has said what he is suggesting and every last one of them contradicts him.
I have never seen Saelorn say that every hp = Meat and on the other hand I have seen him say that every hit has contact. Which makes a lot more sense to me then the "hit" that does not "hit" unless it causes "effect" which means it must of "hit" unless you "save" in which case it must not of "hit".