flex, dillet, vince taylor, etc were known for not being hardcore in the gym, yet they developed very impressive physiques
judges dont ask for gym report cards to see how hard you train, they judge on whats on a stage before them in a sparkly thong (no homo)
I've seen matarazzo clips where you wonder wtf, how did he grow training like that? all partial reps of isolation exercises done with poor form, little intensity..