Modern "EDM" producers actually receive a lot of criticism for these practices from both critics/academics and laypeople. I think the massive commercial success and general enjoyment of this music actually comes from the spectacle of the "live" events, and so as an extension even just listening to it at home, the spectacle is implicit and can be experienced vicariously to some degree. On top of this, this music as a product is obviously extremely easy to produce in comparison to other genres/processes and is thus lucrative to profiteers.

Another reason why such utterly cheap production habits have been wildly accepted is because of the already established history of house music and techno, which was originally revolutionary, because those sounds and the contexts for which they were experienced ironically represented newfound human feelings of liberation, from a youth movement to escape a bankrupt Detroit to the fallen Berlin wall. Techno was a way for people to grab the rising technocracy by the horns so to speak and make something specifically human out of it.

To me, this just indicates that you aren't familiar with what the human element of modern electronic music is. I definitely understand where you're coming from with trance, I'm not the genre's biggest fan either, but there are certainly methods and techniques of production that give artists unique characteristics. "EDM" that doesn't sound like it was produced by an artist with some sort of vision or goal in mind is simply bad EDM. It's extremely obvious when someone releases a by-the-numbers boring dance track, it's the same thing as the awful pop that plays on the radio.

Anyway, my point is: even music with "repetitive structural patterns overlaid on similar timbres" cannot be replicated with any genuineness by computers. Not yet, and probably not for a very long time. We, as people, can sense the insincerity. Now, if the goal is literally to have repetitive background noise with no real melody or structure then sure we can certainly already do that. But I also would not call that music in the true sense of the word.