Pulling heat from km below the surface isn’t going to reduce surface temperature by 1w/m2, but ~0.001/m2 over thousands of years. Thus the issue is warming the area more so than cooling it.
What matters here is the recharge rate, but all power plants have a finite lifespan. You can simply move somewhere else up to the point you run out of untapped geothermal energy across the surface of the earth which is a rather crazy number.
What matters here is the recharge rate, but all power plants have a finite lifespan. You can simply move somewhere else up to the point you run out of untapped geothermal energy across the surface of the earth which is a rather crazy number.