Ford of Europe has succeeded because its direction and leadership are completely different to its American outfit, and has released models targeting European sensibilities. You will probably not find Mondeos or Focuses in the North American market. Nor will you (easily) find an F-150 in Europe. A Ranger, perhaps, but not the F-150.
You've shown your words to be meaningless. You said the U.S. car brands were "completely irrelevant" outside the U.S., here you admit that's wrong. You move the goalpost and change your assertion to something entirely different. But there is no reason to think this statement has any factual basis either. You're just talking out of your &ss.
You could definitely buy the Focus in the US.