I'm not sure you got the point right. Originally Galileo was supposed to use frequencies very close to GPS. For technical reasons. But this would deprive USA fr

I'm not sure you got the point right. Originally Galileo was supposed to use frequencies very close to GPS. For technical reasons. But this would deprive USA from military advantage they have: they couldn't jam Galileo signals without jamming signals of their own system, GPS. (Maybe I should point out that GPS isn't something that "just works" for everyone: primitively speaking, USA can turn encryption on anytime, making these signals essentially useless for everyone but them.) It isn't about fairness or civilian convenience, it is about USA having an advantage in case of war. So, USA basically threatened to blow Galileo satellites up if EU goes with it. Unfortunately, they can, so EU backed off and changed the frequency spectrum of Galileo so that USA can retain their advantage. Yeah. So, no, Galileo users aren't supposed to fall back to anything. That's the point.