What else is overlooked is that most of Napoleon's wars as head of state were defensive-he didn't start them beginning with the Amiens breach.

But the wars didn't happen in a vacuum - you are ignoring the Revolutionary Wars (Napoleon may not have been head of state but he was a major player in them) - the French wars of conquest left many grievances, which would inevitably lead to further wars to try to recover lost territory and restore the balance of power