I'm not necessarily arguing for one view over the other, I'm just not yet entirely convinced that a computer can't generate art, without devolving into debating what is and isn't art altogether.
That's my quick first thought, anyway.
AI is culturally blind, tone deaf, and dumb. So although it's going to be capable of generating adequate content at some point, it's not going to be changing the foundations of the cultural currents around it in the way a groundbreaking work of art does. (And no - producing "content" mechanically is culturally trivial. It's a change of medium, not a change of message.)
That won't happen until it understands and can influence cultural processes as a personality with agency and something original to say, and isn't just spinning its wheels on MIDI notes and virtual paint splotches.
I don't think art is experienced in one way only, and context is important (as almost always).
In the case of cubism—it was a response to the mode of the time. Form was being questioned. It was a philosophical effort expressed and communicated in its own way. That's one experience. Another is purely aesthetic.
Much the same with music.A computer wouldn't likely [at this stage, anyway] developed the blues. It's not purely algorithmic, though the resulting form can be used to develop one. A lot of that kind of music only developed as a result of empathy and the ability to relate to the poetry and the mood and feelings imbued by it. Likewise, that's one experience. Another is purely aesthetic. Another yet begins with the aesthetic and might explore the history to develop a more profound experience through the attempt at understanding.
I'm quite brazenly biased here. I don't resent the efforts, nor would I disparage the results of computer generated music. But I don't think it compares. By that I don't mean one is objectively better or worse than the other; I mean quite strictly that I don't think they compare.
It wasn't experience that resulted in the emergence—just mild variations on a "consciously" used algorithm. (I know I'm oversimplifying—it's not meant to degrade the author's or other commenters' work in the field)