This is a very entertaining thread. If wearing a uniform during training bothers you, go to a school that doesn't require one.
Where I trained for the CPL/IR, uniforms were optional. Most people chose to wear them, and they looked - and generally acted - more like professional pilots than the students in T-shirts and jeans. The school recommended students to airlines based on their flying ability and professionalism - think about it.
Most importantly, now I'm employed by an airline, I have loads and loads of spare shirts left over from training. Which means I only have to do the washing and ironing every couple of weeks.
