What dependence on specifically ground-drilled fossil fuels are there in alternative energy? Aside from the fact that current grid powering the construction/man

What dependence on specifically ground-drilled fossil fuels are there in alternative energy? Aside from the fact that current grid powering the construction/manufacturing of it is currently still a lot of coal / gas turbine. As in, I get there are current dependencies, but what is it fundamentally about the wind turbine's parts is beholden to ground-extracted oil? Plastics/fiberglass (should be replaceable)? The electric dynamo because of needed heat in metallurgy/refining? For solar (silicon solar cells specifically), again, what is it beholden to? Silicon? Etching chemicals? I can see oil still being used for lots of industrial processes (and plastic production), but ... EVs are going to drop a massive amount of demand for them. And while plastics suck for lots of reasons, fundamentally plastic is fossil fuel carbon that has been sequestered in a durable long-lived form. I'll check it out, but again I wonder if the dependence is due to someone "growing up" ensconced in a petroleum world not realizing the full path forward that will eliminate so much of it, particularly the massive scale of burn-into-CO2 part.