I’m no fan of Elon, but come on. The problem people are facing when they decide this is impossible is that they’re picturing a terrestrial data center strapped to a rocket and dropped off in space.
If instead you picture a satellite with some compute modules in it you’re good. Can a satellite generate power? (Yes) can a satellite scrub heat equal to the amount it can generate with solar panels? (I don’t know, ask someone who has done it successfully a few times)
Unless you've got some magic beans that turn "some compute modules" into a significant fraction of an earthbound data center, and you can fly acres of solar panels and radiators around space debris, it really doesn't look plausible.
If instead you picture a satellite with some compute modules in it you’re good. Can a satellite generate power? (Yes) can a satellite scrub heat equal to the amount it can generate with solar panels? (I don’t know, ask someone who has done it successfully a few times)