OK but look at most DSLRs.
Some people buy fancy cameras and never take them off of program mode.
Others will eventually learn to do things like adjust shutter speed, f stop, iso, etc.
But everyone I talk to wants to be a "photographer" and wants to know how to fiddle with a cameras settings. Same as every guitarist I know, whether or not they can play well, wants to be able to play songs well.
With a camera, or a guitar, you can buy a decent model that will take you all the way (until you get really high end).
With photo software, you don't have that option.
If Apple did the Photos app thing right, they would be able to keep the advanced features and provide a seamless path from n00b to pro.