Leeds, I'm a military man. I have worn uniform (school or RAF) for the last 37 years. Uniform encourages group identity, team ethos, camaraderie and a sense of pride (albeit the Rayban factor in certain environments). Ryanair, BA, FlyBe, Virgin etc also insist on uniform for the same reasons, although they may use different terminology such as "Brand".
Uniform only "looks funny" to those who do not understand what the wearing of uniform is meant to achieve. I hope we sit together on a flight deck in the future so that you can demonstrate your superior flying skills that were acquired whilst wearing your Armani jeans, Crocs and a stained T-shirt.
PS. Speak with true aviators, such as Polly Vacher and Q Smith, and they will tell you that a bit of Captain play acting gets you a very long way in countries other than the UK.
PPS. I presume you wore uniform at school. Why?