John Kerry had nothing to do with this. It was well before his time.
Why don't you look up the real story of the surrender of Cornwallis at Yorktown in a real history book.
Over 10,000 French Army troups and ~8500 American irregulars were the land fighters. But the real reason for the victory was that the French Navy had defeated the British Navy in Chesapeake Bay, essentially trapping the British and leaving them vulnerable to attack from the sea.
Another thing to realize is that the French were fighting the British all around the world. Preventing them from sending more than a small part of their resources to the Revolutionary War.
You said that the “French did all of the heavy lifting.” In other words the Americans did NO significant work in EVEN ONE SINGLE BATTLE. Only John Kerry would say the same.
I notice in your second post, you modify your tune, and say that the French were significant in the defeat at Yorktown. This is absolutely true, but it is universes away from saying “the French did all the heavy lifting.” They did NOT even do ALL the heavy lifting at Yorktown, let alone the entire war.