To add the opposite of this, cats do cover up their feces in the wild very well, and housecats will in a litterbox too instinctually. To hide their scent so they don’t get eaten.

It’s all about needs. Humans became the top of the food chain and stopped needing as much, so we started doing other things. Also in the wild if there’s wind then there won’t be as much on things, dust really only starts to gather once walls are built (or in caves I suppose.)