Who are the "bleeding hearts and artistis" from the Wall.?

In the Trial, the schoolmaster says they were the ones that prevented him from "flay[ing] [Pink] into shape" and in Outside the Wall Roger Waters says they are the "ones who truly loved [him]." This makes no sense to me b/c it seems like nobody even showed a fondness for Pink besides his adulterous wife and groupies, and there was nobody to keep the schoolmaster from flaying him into shape. The only person I can think of that came close to being a person that loved Pink was his father, but he was specifically mentioned in Another Brick in the Wall (Pt. 1) as being "just another brick in the Wall" and in the movie he was part of the procession of people who built the Wall during the Comfortably Numb section.