Soldato
It would be an incentive to reduce usage through insulation and turning things off. Less power demand and power generation required.
Agreed it is not a greenhouse gas, but the waste heat has to go somewhere, absorbed by land, sea, atmosphere. Therefore it does contribute to global warming.
It only contributes because the mechanisms that would ordinarily deal with excess surface heat get compromised by the increasing levels of greenhouse gases. So your statement is technically not correct as a standalone comment.