When I walk through a forest, it is full of life. There are dozens to hundreds of critters living above and below me everywhere I walk. When I walk through developed areas, it is lifeless pavement. Anything that reduces humanities footprint, leaving more land to Nature, is probably a good thing. I hope people don't give up on solar paneled roads.
If solar panel roads cause more waste and carbon emissions, while supplying less actual power, I certainly hope we give up on them. The ecological calculation requires science and engineering, not vague feelings about what's probably good.