Just want to back you up here and say the deeper ethos sometimes DOES matter. People need to stop acting like a piece of generally good advice applies to every situation ever. The "stop gatekeeping" pendulum has swung a bit too far (although the principle is great and, incidentally, punk as fuck!).

When did we decide everything has to be for everyone, and everyone has a right to participate in everything, just by virtue of existing? What would these folks say to someone who walks around in - e.g., Sikh cultural accoutrement - but has zero interest (and even a snobbish disdain) for the underlying religion? "Good for them, we shouldn't gatekeep"? Fuck outta here.

On the one hand, all culture and art is syncretic, full stop. I'm not saying punk rock is off limits in any way, that'd be absurd. But at this point it's got what, like 40 years of maintaining a broadly consistent ethos or spirit? That's remarkable, it's valuable, and it's only been possible because of gatekeeping - passionate community members putting forth effort to maintain the community identity. In a time when every damn thing of cultural significance is being hollowed out and commoditized for profit, we should all celebrate punk rock staying punk.