And blinded airplane pilots. This would create a HUGE no-fly area in the US.
IIRC, the January 2008 Scientific American article “A Solar Grand Plan” revealed it would take a large part of the southwest to meet our energy needs, bigger than Musk is claiming. Unfortunately, the article is behind a paywall.
You need energy storage, too. Compressed Air Energy Storage is limited by geology; batteries don’t last long and use lots of materials; pumped storage has no sites left; flywheels, supercapacitors, and others haven’t proven out for large scale.
What “blinded pilots”? Musk is talking PV panels, not focused reflectors.