GPS is a military project controlled by the US. With just a switch of a button the civilian receivers will be practical worthless for navigation. They can't do that on Galileo or GLONASS. I imagine Russia can dial down GLONASS precision for civil use cases, too.

At least Galileo is a competitor, and the political/military discourse about it is still ongoing.

https://en.wikipedia.org/wiki/Galileo_(satellite_navigation)...