I agree, if something makes someone more confident or comfortable in themselves, more power to them. If everyone was the same, the world would be a boring place.
I did read this about dress sense for people on the spectrum.
Quote:
Dress sense
What clothes you wear gives off a message about you.
If you wear bright clashing coloured clothes, perhaps intending to look confident, many people are likely to lose interest in you.
If you wear cowboy boots, ripped jeans, heavy metal tee shirts and a studded leather jacket people might either be too scared to come near you or will expect to be able to talk to you about heavy metal music systems, life on the streets and various different night clubs. It is a a very difficult image to pull off.
If you dress in natural colours such as blue, grey, dark-green, black or white which people cannot laugh at but still look trendy people will judge you on how you come across rather than what you are wearing which is likely to be what you need.
It is often a good idea to hear someone else's opinion about what you should wear (talk to someone who you can trust).