If people were not lazy enough to "introduce variety" to begin with, AI wouldn't have the slop reputation we know it to be today.

But any UX designer/engineer will tell you defaults are important. And on social media we're seeing a ton of "default". Which explains the disparity in reactions. "Default code" isn't bad in most contexts. "Default art" is bland by definition; pre-AI it wasn't exactly kosher to use stock art by itself either. It's designed as a placeholder.