That just sounds like pattern recognition with extra variables. Subdividing people into groups and then analyzing them certainly doesn't sound like a task that a machine will struggle with. Why should the algorithm need to be able to see the hidden "why" when most of us creative types can't see it or define it either? It's just a function of having observed enough people of a certain type. You want to generate something that will impress the people I'm targeting? Just analyze the posts of all my followers on social media. Analyze the content that is "liked" by people in my demographic range and with close proximity to where I live. Analyze the works of creators who belong to my generation and who listen to the same music as me. Do that all nearly instantly and then offer me a selection of options picked from those various methods. I don't expect "good taste" will be hard to conjure up. I already can't tell that a lot of these octopus drawings weren't created by a talented human, and we're still early and unsophisticated in our data analytics.