The US could own that business. But Congress passed ITAR legislation that effectively makes it nearly impossible to sell any military tech even to countries like Australia. It isn’t that they don’t want US companies to sell. It’s that the regulation is huge and self-contradictory so nobody will risk signing off on proposals. The extra delay makes responding in time to be considered almost impossible. This is just another way government makes it hard for business.
Companies that sell some equipment do so because somebody in government said, sell your xyz to (fill-in-country-with-great-lobby-here.)
Personally I am very happy that the Swedish government broke the contract with Thyssen-Krupp. The Germans had entered the collaboration with the Swedish shipyard with the promise that Kockums would be treated as an equal partner. That was soon shown to be a lie. Instead the Germans used the deal to protect the HDW shipyard in Kiel.
Regards,
GtG