FAA Problem
For once, the French are not the only obstacles in this arena.
The FAA are a much bigger obstacle. Because they are charged with "Promoting" USA/American Aviation, they often speak with a very forked tongue.
If the FAA actually insisted that the USA airlines and pilots and atc actually followed ICAO rules, the political fallout in the USA would be against the FAA - and being good bureaucrats, they are keener on their jobs than they are on this aspect of International safety.