Thats not really true. In areas, there is grazing of it.
Beneath the Panels: How Sheep are Supporting Solar Energy by Improving Solar Farmland
Solar grazing by lamb and sheep are giving unusable farmlands new life as a cost-effective method for vegetation control on land used for solar panels.americanlamb.com
more possible benefits:
Study shows how solar farms can revive insect populations
Within five years, insect abundance tripled at these two solar farms.
theprogressplaybook.com
The large solar farm near us hosts a healthy flock of goats to control the grass/weeds.