Don't tell, show is useless if prescribed to the piece in general, because it is distracting from the actual problem: unfocused narrative. The newer writers will interpret it as zoom in, describe more, when the publishers and agents likely meant know the main purpose(s) of each of the scenes, and demonstrate/highlight that with the prose accordingly. The spectrum is purple on one end, as you mentioned, and annual business report on the other. A piece can be blurry in either case. That's why if I ever suggest a show approach rather than a tell, it is always specifically, with consideration of where I think the writer intended focus in that particular scene.