Having the capability is important. Outsourcing has removed the crown jewels from many companies, leaving them little more than marketing shells. The real value is in the technical know-how and skills of the people who actually made those companies run. Without that, there is no company and no product.
If ultimately the only thing you end up owning over others is ideas it becomes increasingly attractive simply to opt out of such rights.
As you'd imagine, the norm in the UK[1] was to be against "IP theft" 200 years ago, but the US had a more cavalier attitude then - I wonder why.
1. https://www.smithsonianmag.com/smart-news/how-industrial-esp...
How is this not the same as what China is doing now?
(sorry.. i know its a low-blow :P)