Except that state governorship is much different than the POTUS. Neither New Mexico nor Massachusetts have foreign policies for example.
So there we have to go with what they say, or more reliably, on what we can infer as their core political philosophies. As governor, Johnson consistently, and often successfully, stood up for libertarian principles. Romney is a thoroughgoing corporatist. The difference is quite stark.
Once again, if I was under the delusion that Romney would be significantly better for the country than Obama, even if I disagreed with him on many issues, I could be persuaded by your logic. But I'm not. If I had to pick between Obama and Romney it would be a coin toss. It's simply not worth weighing on a distinction between them when I can, instead, show real support for the libertarian movement.
I support the movement on Facebook and among friends and co-workers. I also vote LP on local and state ballots, so I too support the LP.
I'm not really trying to convince you, I doubt I could anyway. I'm just saying that I believe that for the same reasons obama didn't close Gitmo, or have a little sit-down chat with tyrants, Johnson wouldn't be able to do 90% of the Libertarian platform. He would not be able to legalize pot, nor would he close the bases, or bring all of the troops home, or even audit the Fed. The POTUS is not Caesar. That said, he would be a better POTUS than Romney and obama.
I believe that Romney is better than obama in that he will actually revive this country economically. Will he stop the wars? No. Will he reduce the deficit? Probably not. He will however, turn the economy around and right now, the way things are, I'll take it. Obama MUST go.