You presuming to tell other people how they should think, according to your worldview, is also “bullshit”.

Accepting how other people have other opinions, rightly or wrongly, is just part of being a participant in this world.

If you interact with others as you are doing here, then perhaps you need to learn some wisdom.

Note that I agree that judging others by how they dress is bullshit + I have always hated it myself. I would also hazard a guess that you judge others for how they dress e.g. I expect you don’t like power dressers, or extremely fashionably dressed people.

The existence of society is a form of control on you. That's almost the entire point of society; standardized expectations and norms meant to maintain order.

So's... like, everything in society, really. Capitalism itself comes readily to mind, as an extreme form of soft social control that's actually not all that soft at all, in aggregate.

In the case of clothing, marking willful non-conformists is, notably, a significant part of its true (as in: accurate and useful) signaling value. This is where some counter-cultural fashions come from, in fact—an effort to make it crystal clear that one is dressing contrary to fashion norms on purpose and not by accident. To signal a distinction between the non-conformist and the ignorant or destitute.