I'd imagine it would depend on the performance scaling with that 2000W TDP CPU. If it gave me 20x the performance of a 100W TDP CPU I would easily accept that tradeoff. If it gave me twice the performance, it wouldn't be worth it. Somewhere in between those two extremes you would have to start weighing the benefits of it.How could it be anything but sarcasm?
I don't think it's odd to start looking at the power your computer system is using, and try to reduce it. Especially if you have a high end CPU and a high end GPU.
People generally don't run their hair dryers or water kettles for hours at a time every day like a gamer would run his 2.5Kw TDP cpu with external Ron Davis radiator...
As far as not caring about a 2000 watt TDP cpu, I think most people would soon quit gaming with a 2Kw+ computer system for hours a day when they saw what it added to the electric bill.
Assuming it has some kind of reasonablely low idle power usage, I'd stick a 2kW CPU into my system in a heartbeat if it was 16C/32T and gave twice the ST performance of my 4.5GHz HSW-E system.