This is very obviously wrong. The economics of crypto mining are almost entirely dominated by power cost. Nvidia's decision here simply means they will use other hardware, not more of the LHR hardware.
Nvidia already can't make enough GPUs to satisfy demand. Why would they try to increase undesirable demand (which is going away soon anyway, at least for ETH).
This is what happens when you try and build a planetary messaging system with inefficiency as a design goal.
Nvidia doesn't unilaterally have this power - they are making the same rational choice as all the other GPU vendors, they are just doing it somewhat more forcefully.
Advertisers and marketers fighting for top positions are where the real curse comes from IMO.