When I was in primary school we all got the chance to learn a traditional musical instrument. I picked the flute. I stuck with it until I was 16. I got good enough to play pieces at Grade 5, which is Standard Grade level in Scotland, I assume it's the equivalent of GCSE level elsewhere. We could have learned clarinet or trumpet instead but not any "useful" instruments like guitar or drums, or anything like electronic instruments and digital composition and production etc.
One of the things about learning an instrument is that to get good at it requires rehearsal, which sounds really obvious but was completely overlooked by how they divided up resources for teaching it. The other girl in my class who learned flute lived in a three bedroom house with a garage and could go practice the pieces in a quiet space at home. I lived in a two bedroom council flat so if it wasn't the neighbours complaining it was my own family telling me after ten mins they'd had enough. You can't put headphones on an acoustic instrument after all. It means this world, of learning and playing classical music, is only available to people of a certain privilege and circumstance, and that really puts me off it as a culture.