The study I think you’re referring to came from a crypto company. It’s the equivalent of when cigarette companies released studies saying smoking was good for your health.
It's weird seeing this argument that green energy is somehow free and infinite energy.
And yet, look at the market for Nvidia and AMD GPUs right now. The miners already know that gamers have been pushed out of the high end GPU market. Supply and demand doesn't go away. People still need electricity for doing things other than mining Bitcoin. All that happens is their electricity rates go up.