Its not that they don't know, they just refuse to learn because of how much money it can bring in a speculative performance.
There are many articles on people converting power stations just to run crypto.
The lofty prices of cryptocurrencies have investors sinking money into electricity generation, risking a backlash.
www.wsj.com
Power plant was left for dead until the cryptocurrency boom came along.
arstechnica.com
The power plant believes it will remain profitable even after the halving event in May.
www.coindesk.com
People are just too busy earning them coins to honestly care.
I personally have a dedicated 1500W grid tied solar system just to run my 2 machines which draw a total of 700W.
I do not think it meets 100% of demand, but it get enough not to impact my electricity bill that much @ $0.21 / kwh.
As long as i do not turn the AC on, during the day i am net negative.
But that is the extent to my crytpo farm... i do not intend to expand it.... its a collection of old videocards or cheap cards i have collected, and just throw to mine because i do not like selling my stuff second hand.
So maybe in a few states like California, i think they may ban it.
But In California... well.... we do a lot of things that are ban'd because people just like being very loud about it, but no one really cares to actually enforce it.