Clothing is a personal choice and cannot, other than in a society that dictates what you wear, be anything else.
When you get up in the morning you put clothes on and, unless someone dictates what these are, even if you put a bag over your head and choose from a heap provided by other people, that you choose to dress that way is a reflection of who you are.
But that applies to everything we do in life, from cleaning our teeth, through food choices, house furnishing, the work we do and everything else.
At boarding school in my youth in the strict standards of school uniform, we all personalised it instinctively, from my studied insolence, to some girls precise neat dressing in it, everyone's uniform was personal.