I think we can't rule out the explanation that all the ideas of space data centers could be connected to a desire by some of finding additional applications for rockets that can transport stuff to space.

I think we can't rule out the explanation that all the ideas of space data centers could have been connected solely to a desire to pump SpaceX's IPO.

It also provides a post hoc rationale for rolling Elon's loss making businesses into SpaceX. The bull case for ODCs looks a lot like the bull case for space based solar power that Musk once called "the stupidest thing ever"...

That said, SpaceX aren't the only entity proposing ODCs, they're just the only ones promising they're going to make country-sized profits out of them...