It wasn't only France that had the chance, it was the whole Alliance. The BEF, France, Belgium, Denmark and Holland could have all attacked Germany while Germany was in Poland.
The German propaganda gave the good idea that the German Western Wall was impregnable, and the Allies believed it. With only a few, far stretching, recce missions into the Rheinland by the French, there was nothing by any of the Alliance members. Something of a disgrace looking back, but to them they would lose.
And no one can really blame Britian because the Germans had sent 1.6 million into Poland but they sent 3.3 million into France in 1940. This means they still had a lot in Germany during Fall Weiss. Britain had 350,000 men at the most, the obvious minorty during Fall Gelb, since the Alliance had 3,785,000 men.
On an aviation note, you can't really compare the smaller nations (Belgium, Denmark, Holland, Poland etc.) with the larger ones that had time to create an effective industry, and had the war to give them the challenge of getting the edge over the enemy. If you were out, you wouldn't bother.
Also, in Fall Gelb the Allies were only just beaten in numbers of aircraft, 3, 791 Allied aircraft against 3,824 Luftwaffe.