Yes, but suddenly you need different kinds of standoffs instead of one uniform size. This makes manufacturing a bit more expensive, logistics a bit more challen

Yes, but suddenly you need different kinds of standoffs instead of one uniform size. This makes manufacturing a bit more expensive, logistics a bit more challenging, and installation a bit more complicated. All of this means it's going to be more expensive than standard mounting hardware. Not by a lot, but solar panels have become cheap enough that even small differences matter.