Microwave receiving antenna arrays aren't solid like solar panels on earth - they would essentially be a big grid of wire loops suspended above ground over maybe a square kilometre or so. While you probably wouldn't want to live underneath this, plants would grow and animals would not be harmed wandering in and out underneath it.

So the benefit would be that substantially larger surface areas of renewables could be deployed with fewer maintenance concerns (i.e. thin antennas don't really care about dust, and present little cross section to being struck by debris).