So I 100% agree with the sentiment here but... there's a principle behind it that I think is more important than any specific Subculture Signifier. Making it about the Subculture Signifiers can wind up twigging people out when they don't need to be twigged out.
There's nothing wrong with wearing polos. Or keeping your house clean. Or shaving, or 'politeness', or whatever. But.
... A very important test of someone's character is how they deal with things that Society (TM) in general, and their social circle in particular, thinks are Not Okay. If society says it's Not Okay to be gay, are you capable of being decent to gay people? If society says you Have to like drinking, and you can't stand the taste or effects of alcohol, are you gonna let people pressure you into drinking anyway, to get along with others? If your social circle says that it's Not Okay to listen to certain music, are you going to listen to that music anyway? If your social circle says that people with Political View A are all evil bastards, are you able to be decent to someone with Political View A? (Or someone with Political View C or Religion Q that vaguely looks like Political View A, if you squint?) Things like that.
If you see someone who has stripped their life of anything that society disapproves of, that's not a great sign. If you see someone who has stripped their life of anything their social circle disapproves of, even if they're alt and anti-government, that's also a bad sign.
You need to have something in your life that is yours, that is not dictated by someone outside you, that no one is going to take away from you. You need to have some part of your life that you will defend and hold onto, even if everyone else is telling you that it's wrong. Even if everyone you know thinks you're dangerously bad and stupid for it.
Because if you don't have that, if there is nothing that you will face god and walk backwards into hell for, if there is nothing that you know is right and good regardless of what anyone else says... that is when you turn into Polo Guy from the OP. It has nothing to do with whether you like normie bullshit and fold your underwear- there's plenty of punks and goths and metalheads who don't have it, and there's plenty of people who look like your mom who do.