It's hard for an uprising of poor people to shut it off. It's the ideal place to run your CEO / President simulations.
I say this tongue in cheek, but in all seriousness, I can't really think of any other benefit, and I no longer have a lot of faith in the good sense of some of the people involved.
Elon makes a relatively good case in the Dwarkesh podcast. I recall it like this:
1) Energy infra is going to be seriously limited on the production side well, well below demand
2) energy engineering solar for space requires less materials than for gravity-based solar (!)
3) you cut out distribution network needs when you just launch stuff all per-pod in space
4) SpaceX thinks it can create a scalable vertically integrated production facility to turn raw materials into space datacenter pods, with the exception of chips.
As a business bet, this is predicated on 10,000x inference demand growth - if we have that, and SpaceX can get the integrated production rolling, and get Starship launching, then these will be actively utilized at scale.
Whether you are bullish on the whole plan should, I think come down to your take on those priors: 10kx growth, ability to manage supply chain and production, Starship outlook, and silicon access.
I'm not bearish on this after listening to the podcast; it has a very Elon-like returns distribution - if they're wrong on a lot of this, they'll probably have some moderately price-competitive datacenter facilities in space and a lot of built organizational knowhow while Brooklyn journalists dunk on them for spending all that effort to just replicate what we have on Earth. If they're right about most of this, they'll have an unreplicable head start, both due to years of experience, and due to the cheap launch they gambled on ten years ago, they'll have a nearly insurmountable moat.