Yeah, it’s a pretty common thing. Many disadvantaged groups end up putting a lot of effort into how they look, because it’s something relatively inexpensive they can control and express themselves through. That’s why lots of fashion and culture starts among poor / gay / racial minorities, and then is co-opted (or appropriated) by the mainstream. So finding the look hot isn’t too surprising, given that that’s what they’re going for - no one wears pristine white tracksuits for practicality.

And the confident / arrogant and outsider / dgaf attitude can be pretty attractive to someone, especially if that person is shy, or feels trapped / bored by the more conventional requirements of middle-class society. I think that’s fine (nothing wrong with finding something hot) and can even be good, if it helps people overcome a lot of the social prejudice against working class culture. It can be problematic if it becomes dehumanising, seeing chavs as primal and animalistic, as happens disturbingly frequently with white folks fetishisation of black men.