This type of art is not about the visual result (which can be generated by a computer more easily), but about the fact that they spent a lot of time creating it by hand. It is, indeed, art but also a massive cliche in the fine arts world.

As someone who spends about equal time in the fine arts and tech worlds, I also have things I find tiresome and uninteresting.

But over the years Vasarely[0] hasn't gone away and neither has Hirst[1], and the Art World even still has some love left for Richard Prince[2].

So rather than thinking in terms of cliché I've found it more useful to just say there are other things in art that move me a lot more. If someone else is moved by op art, or spin art, or stolen Instagram photos, I'm not gonna rain on their parade. Well, unless it's Richard Prince, that guy's evil. ;-)

[0]: https://www.tate.org.uk/art/artists/victor-vasarely-2095

[1]: https://duckduckgo.com/?q=damien+hirst+spin+art&t=h_&iax=ima...

[2]: https://www.theverge.com/2015/5/30/8691257/richard-prince-in...