Purely on mechanics, the "by any sensible definition" clause does make this a classic "no true Scotsman" argument. What you probably wish to argue is something

Purely on mechanics, the "by any sensible definition" clause does make this a classic "no true Scotsman" argument. What you probably wish to argue is something like: "Those unique 'American freedoms' that ostensibly result in such a crappy health care system --- and the inevitability and necessity of this is highly debatable --- do not contribute nearly as much to actual freedom as you seem to think." What you are actually arguing is: "There exists no sensible definition of freedom wherein the citizens of the United States are free and the citizens of France are not." A disagreement which continues from this point will devolve quickly into an argument about when and how ideas are "sensible". This is perhaps a really interesting topic when pursued in its own right, but the assertion has, at that point, effectively derailed future debate about the different freedoms enjoyed by the French and Americans.