Texas uses robot vacuum cleaners. Not a lot of rain. Definitely a sweet spot for them.

Anyway. I'd guess they'd do better to lay them on the ground next to those dishes, than the expense of climbing up there and fastening them to that massively expensive superstructure. Not to mention the danger to life and limb, climbing around up there.

Generally speaking it's just a mistake to mount solar panels in some difficult-to-reach expensive place.

Optimal: A large flat space near the existing grid, with generous road access and clearance. On cheap land and cheap supports. Where it can be serviced, not too far from the service center.

Those dishes fail on half of those metrics.