Yes let us wait for an optimal aesthetic solution for another 50 years while we choke on our own fumes. Plenty of time to rearrange the deck chairs.
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.