I always hated that argument from people.
Even if they're right — which we all know they are not — it wouldn't matter. Climate change is going to devastate human life if we do nothing. If, somehow, the source of the warming wasn't human-caused, we'd still need to find a way to counteract it. It's not our fault doesn't prevent it from being our problem.
Tuberville's asinine blockade of military promotions presumably played a big part in this. I think it's a smart idea even in a vacuum though. The types of people that would be interested in serving in Space Command positions are, I expect, going to be the types of people least likely to find living in Alabama to be tolerable. Locating the HQ in Colorado is going to be a lot better for their recruitment efforts.
That's not to mention the official reasons offered, that it would be a clusterfuck to relocate the HQ. Which is a perfectly sufficient reason on its own too.