Even if energy is renewal , it is still a limited supply of a semi-fixed total, by bitcoin using an ever increasing % at a growth rate exceeding all other industries, it is still going to cause problems, such as rolling blackouts , and massive price increases in the cost of electricity for anyone unfortunate enough to be on the same power grid as miners.
Why do you think so? PoW has a sustained load, the power grid has only problems with spike loads, like the one that comes from charging millions of electric vehicles, I don't think that is a fair point to be made and not really true. And it is not like that bitcoin uses infinite amount of power, that would only happen if the electricity would be free, which it is not. Also when regulators forbid to mine more than XYZ energy capacity that would be a good thing in the end since that would improve decentralization in total.