You’re saying we should pull heat out faster than it’s replenished, but what do we do in 50 years? Didn’t we learn our lesson from oil that we can’t just kick the can down the road?
Drill a new hole? Takes far fewer resources that replacing a wind turbine or solar panel (that lasts about half that time)
The oil and gas people said the same thing until there were no more places to drill holes!
Two differences, first with the right technology any location works, you can even drill deeper at the same location. Second they refill, globally at a rate of 44TW which is a lot faster than oil.