Stuff like mixing, equalizing, sidechaining and eternal sample hunts all take a lot of time as well... It's why making music is one of the hobbies I had to let go.
Can't wait to get my hands on an AI powered DAW that skips all the tedious stuff!
Am I still the one making the music? Well, I'd argue the 300+ hours I'll probably sink into finetuning all the other stuff will say yes.
(until: smartphone companies generate personalized musicians and directors and writers for you, and then even Disney gets sunk)
Creative people will find creative ways to use new creative tools.
There is even still amazing marble sculpture being made today but we are not going back to ancient Rome in terms of the importance of sculpture as a popular artistic medium of the day.
There will be cool, new electronic music genres from these AI tools and that sound might eventually make its way to whatever cultural icons of the day are making music. Mostly though no one will listen to these genres just like they don't listen to them today. Music just isn't that culturally important anymore overall.
The real big deal is AI video because video is the dominant artistic medium of right now by several orders of magnitude. This is all just a dress rehearsal for AI video at mass scale.