The origin of the power isn’t the only thing that forces you to make this choice.
If fusion (or anything else) adds four orders of magnitude (~200 PW) of new power at ground level, the new global average blackbody equilibrium temperature would increase from about +15 C to about +70 C.
If fusion (or anything else) adds four orders of magnitude (~200 PW) of new power at ground level, the new global average blackbody equilibrium temperature would increase from about +15 C to about +70 C.