I honestly think that being part of a subculture—besides just being a way for teenagers to blow off steam and vent some negative energy—actually shapes a pretty unique worldview in a lot of cases. It’s not always about some extreme rebellion; sometimes it’s just how you process the world around you. Music can definitely play a role in that, though it isn't a guarantee... (for example, look at how Punk drives activism—sometimes even veering into anarchism)
Honestly, I highly doubt that joining some subcultural clique is going to help you develop a
unique perspective on life. Separating yourself from the "mindless masses" just to latch onto another group—even if their values happen to align with yours initially—is really nothing more than swapping out one uniform for another. I’ll give you that music can influence how you see things, but that mostly comes down to you and whether or not you actually let it get to you. Let’s not forget that not everyone is looking for deep, philosophical meaning in every track; for some people, music is just there for a good time, which—contrary to what those massive music snobs think—doesn't automatically make them stupid or less valuable.
Someone's taste in music only tells you enough to put them in a quick little mental box; thinking you can actually *know* someone just by looking at their Spotify playlist is pure intellectual laziness. Personally, I know plenty of total idiots who live and breathe indie, punk, or grunge, and at the exact same time, I know tons of brilliant people who just blast Top 40 hits, dance tracks, or don't give a damn about music at all.