That being said, world generation is a bit like a toybox, or a backdrop to a play in a theatre. Minecraft's world gen isn't worthless, and so improving the backdrop is worth discussing. The differences in the output of implementations matter a lot (to me, at least) and I think Minecraft would be much less compelling if the world was generated using a 3d implementation of Wang tiles. "A few tens of hours" is a lot of content.
Would Minecraft be even more compelling with neural networks doing some of the content creation? I think it might. Would that totally replace the need for human input and invalidate everything players build? No, but that doesn't make it worthless.
