You're still not getting it. You still have to ask permission from places. That's the point. In orbit, nobody is going to care. And you're using words like "should" - should has no place in this discussion. It's an "is-ought" thing. You're saying "they should behave this way" and I'm saying, "they're going to behave this other way."
You haven't reasoned through any of this, you're saying that they "should" do something because it will be cheaper/better/whatever. And that's not how it works - it was never how it worked, but it was less obvious in prior times.
There aren't really any better options. Your bottlenecks are power, land costs, technical stuff, and bureaucracy. In space you basically shortcut all of those problems except the technical ones, and (and this is unbelievably important too), it brings the costs of other things you're doing on orbit down. Sure you "could" build data centers in Arizona or whatever, but they're not going to because they'd have to ask permission, it'd be a permitting nightmare, etc.
These guys are also thinking about opportunity cost. So, say you can build AGI++ you just need more compute. What is the opportunity cost of building terrestrially if it takes you 4 years to build this with an extra year for legal requirements?