Weird indeed. But I think the best place to post is on the AF forum where pax have more experience in CDG transit. Why do you say that you cannot OLCI the CDG-HKG-xxx?
Anyway my short answer is that it is a risky transfer, especially for luggage. It is not uncommon for late JFK flights to be delayed for takeoff by an hour. Why dont you get an earlier AF flight, there are many from JFK? Not worth taking the risk and losing your CX flight.