"Can you honestly say that how we look means nothing?"
I can honestly say I think how a student pilot looks means nothing. Yeah.
Wear a suit to the interview, that's not what we are talking about.
ROTC or CAP is part of the military, that's not what we are talking about.
Professional pilots should wear uniforms while in view of the public. I think it's silly to see student pilots running around in uniforms trying to play airline pilot. But, if it turns your crack, knock yourself out.
Seriously, you pay that kind of money to go to FSA, I can see why they want you to wear the uniform. It makes you feel better about spending that kind of dough to look like an airline pilot while learning to fly a plane. That's why ATP is doing it. Makes perfect sense to me.
As an aside...I once owned four small aircraft that I rented out to free lance CFI's. If a CFI wanted to use one of the planes, I had him meet me at Starbucks. Once, this kid from one of the big academies showed up in a business suit. I told him he looked nice but if he went anywhere near one of my airplanes dressed like that, he'd regret it, hehe. I think he found a regular job at a nice flight school. Before you rail on how unprofessional my operation was, several folks that rented my aircraft back in those days have gone on to regionals and majors...to include UPS. I doubt if an FSA guy would ever stoop so low as to be a free lance CFI, but if you do, you might want to leave the uniform mindset at home. You can be just as professional as a free lance CFI in jeans and a t-shirt as you can in a uniform.