"UnReal World", for the most extreme example I know of, was released and has been in development for more than 3 decades. It's still receiving regular updates, with the dev kind of mixing game and life. It's a game about surviving in the Finnish wilds, by a dev who lives out in the middle of the Finnish wilds.
If you're building the next rehash-of-popular-concept, this asset generator at best saves you a couple minutes shopping the Unity Asset Store, and selecting the right store-bought texture in blender. But it will raise the bar of what's possible with new, innovative settings, which I'm really looking forward to.
In an ideal society, everyone has time, energy, and resources to create art themselves just because it makes them happy, as opposed to having to turn a profit.
Maybe its a good thing because it will allow indie devs to spend less time/money on art.