I have to say that when I worked in MC4 and clicked on a note in staff view, it did sound out and dragging it allowed me to hear the pitch change. Drums on TTS would also change instruments as well as I dragged a note.
I haven't done much staff view editing recently and have switched to X1 so I have not really paid attention.
I do recall a few times where it did not sound and it had something to do with the track being selected or highlighted back in the console view IIRC.