It seems so simple, why hasn’t Apple split iTunes into Apple TV and Apple Music apps for macOS?
Opinion: iTunes is a disorganized mess and needed to be retired years ago. If ever there were a weak spot in Apple’s ecosystem, it is iTunes.
The easiest solution would be to make an Apple TV app (buying, renting, browsing available services) for macOS that functions exactly like the one on the Apple TV device. Along with that have an Apple Music app that allows single song or album purchases if you aren’t doing a monthly subscription.
Are there any good reasons for not doing this yet?