There's things I don't like about Gen Z, but most of it I understand the reason behind it. The not liking rock music thing is too bizarre though. Everyone liked rock music. If you were in grade school in the 2000s, you were liking music from the 70s, Pink Floyd, Led Zeppelin - through the 90s.
It seemed like every generation appreciated rock.
But I've heard that Gen Z does not like rock music. I don't get it. To me that's like "not liking apple pie"; it's such an American cornerstone that it's baffling.
Who or where did you hear that from? That's the first thing to ask. Plenty of people in the thread have mentioned how the media tries to engineer people's tastes, but they also try to engineer how you view other demographics. Driving a wedge between generations is a great divide and conquer tactic to prevent critical mass among any group.
Also, pay close attention to the distinction between not liking and not knowing. If you see a headline like, "Gen Z doesn't want to listen to rock music," it's likely they polled, "what do you like to listen to," and the respondents were unfamiliar with rock music. Then the author wanted something vaguely true, but sensational to bait engagement. That kind of thing is a favorite trick of the media.