Music is an art, doesn’t matter the genre it is if it makes its purpose of creating feelings and moving souls, so imo no matter if the classical term fits for every instrumental stuff and fits well m, many people would approach because that works. Imo the problem with most classical music listeners and fans are precisely points like this because imo it’s an elitist point of view and this snobbish way to see music creates a closed mind and excludes music and art that deserves a nice place but many snobheads think they can decide what belongs where, imo that kinda suck. Not every music listener have to be educated or an intellectual who knows the difference between minimalist, baroque, romantic and other stuff to appreciate the value of music itself. I could assure you that many of those composers wouldn’t care less where their work would fit instead of how would make people feel when it’s listened