I find the idea of blanketing mountainous wilderness in relatively short-lived e-waste just awful. Surely there are much better terrains for solar panels?
Economically, I'm sure the locations chosen were optimal. You'd imagine that actual mountainous wilderness would be a much more expensive terrain to blanket with solar panels, compared to flat areas. If there were other choices, economically they'd better options.
As others have said, it's hardly waste, it's an installation with a 30-year lifespan.
It's also not just aesthetic - flat terrain is just so much more practical.
Outside of peak summer it's much more optimal to have a south facing slope actually.
I'm not saying that deserts are a bad place for solar. What I'm trying to say is - it's often worse than people think and it requires special infrastructure.