Yep I understand better thanks to another post.I don't believe that's the issue here. It's about making an app that is available in one EU state available to all EU states - i.e. stop treating the EU as a collection of markets but as one market.
It doesn't impinge on the right to make an app for the USA (or China, or Mozambique for that matter). It's just saying if it's available in France, it should also be available in all 27 states as they are part of the same market.
I issued a response just a bit before your latest response.