That's why treaties sound reasonable to me. Though I'd imagine they would be more like Climate Change ones. Before Iran there were bombings to stop nuclear arms. Imagine a country getting bombed because it's detected their building a data center.

> we've never had to go to war to prevent nuclear arms. We've never had to go to war to ban weapons in space

We've mostly been blindsided by covert nuclear programmes. As for weapons in space, they don't have any purpose. The moment they make sense we'll see weapons in space.