- No additional consumption of land
  These benefits are comparatively minuscule

I think that benefit is significantly less minuscule than you make it out to be. For rural installations, sure, but in high density areas the cost of land can be absolutely insane, and those high density areas tend to have high power demands just due to the density of humans that live there.

You can put all the ground mounted panels out in the countryside hundreds of miles away from the density, but high power transmission lines are also expensive and dangerous to maintain. Generating the power right where it's used completely eliminates a problem which has serious negative consequences like wildfires.