It’s pretty objectively inconsiderate of others to make unnecessary noise like that on public transit or even too loud for personal use in public spaces.

I can’t say I understand where you’re coming from because I don’t have that shared cultural experience.

What happens when you don’t like the music someone’s playing? Or you want to watch a video on your phone or enjoy a audiobook with earbuds? Do you just blast your own even louder? Do the people that don’t enjoy it really not exist or are they just threatened with violence until they start “enjoying” the culture?

I mean I’ve seen it all around the world, I understand to that extent that some cultures normalize it. But I see it in the same way cultures normalize behaviors that are not good for subsets of the population. Americans culturally hate science, intelligence, and empathy. Japanese culturally hate not blending in and doing your duty. Etc etc. just because something is normal doesn’t change that it is harmful.