You're hand waving the whole "data center" part away. Comms is one thing. That's probably 1% of the challenge.

Sure, but considering the size of the challenge it makes sense to figure out the parts that can be studied on the surface first. Challenges like procuring, challenges like setting up relationships with potential customers. You probably want to figure out everything you can so that when you move on to the hard part you aren't distracted by the rest.

Consider the alternative. SpaceX figures out how to build the datacenter in space thing but fails at the rest. That would be an expensive mistake.