That's fair. Most demolition waste can be crushed and used as stabilisation for new constructions instead of mined rocks, and that's also often cheaper. However you are right to point out the quantity which is small, for now because we didn't really scale yet.
It will be comparatively small even when scaled out. PV waste too.
My biggest concern with wind is not the blades, it's concrete foundations and perhaps steel. Concrete inherently releases CO2 when produced (from calcining of limestone), even if the energy source is non-fossil. Nuclear also faces this issue, of course. PV doesn't typically use concrete footers these days, instead using steel anchors that go directly into the ground.
There are plans to make lime from silicates, but this is not a mature technology.