People also said similar things in the past (I'm a musician as well: guitar, piano and bass) about Synths and Drum machines (and things like GarageBand which can do backing drums and even basslines semi-automatically now).

Some of those things enabled others to create new types of music or express themselves in different ways.

People have said that about robots and computers in the workplace, and indeed, since the 60s, more and more jobs have been automated. And there are less musicians now. Film scores and albums are produced with samples instead of bands or orchestras, reducing demand for session players, leading to less income for musicians, leading to less musicians.

And while automating dangerous jobs is a good thing, generating AI music isn't. It's not as unethical as generating deepfakes, but it's useless, and bad for society.