You can procedurally generate textures, sounds and geometry
Does any game do that today? I’m not aware of any. ??
Today? No, I don’t think any game does it.
Well, my comment that you replied to was about a specific game that is already out, today. Hence, my point still stands.
Let’s hope that future hardware and games are aligned more with what you described, but today’s games do have limitations, based on the day and age they’re created in.