Of course, your former point begs the question whether 'they' are any more competent in running the 'empire,' know that there's an empire to be run, they're the ones to do it and they're up for the job. Reagan's foray into Lebanon or Bush and Clinton's shouldering of the empire in Somalia suggest that some haven't quite got the knack of it. And then there's the Powell doctrine of showing the flag only on sure things.
But I think you're on to something here and I suspect that defending the general right to be in control carries with it a higher risk of things unraveling and unanticipated entanglements, both internally and overseas.
Dennis Breslin