For example, if the Texas grid became ~100% wind and other clean-source-powered, then BTC mining in that grid would not in any practical sense consume clean power that could otherwise displace dirty power. The 100kW you use to feed your miners could in theory be used to reduce production from a nearby coal plan in Oklahoma, but in practice, since the grids are not connected, they aren't, so that is probably the right scale.
That said, if it gets big and the miners are consuming enough production of solar panels and wind turbines to slow clean energy buildout on other grids, that's the second order of the same problem.
So, maybe everyone with crypto should, instead of convening to buy the constitution or a basketball team, go fund the takeover and conversion of an entire grid to clean energy, and build all the miners there.