UGH! Profiles are just flat ugly. A flip-flopping plank is a very poor and unrealistic representation of an airplane. Some people just can't make the connection and cringe when they see a profile and I can understand the feeling.

As for aerobatics and 3D, I think most builder/fliers are impressed by the performances of full size planes flown by pilots like Leo Loudenslager, Patty Wagstaff, Sean D. Tucker, Mike Goulian and others and like the challenge of duplicating those performances with a model that at least looks like an airplane.
So, if someone just doesn't like profiles why try to beat him into submitting to your view that a plane has to be flat.[]