Certainly, and I think you've touched a seemingly obvious but very often overlooked point with regards to the issue of climate change. There was a c-span book tv segment on a few months ago with Erik Conway, co-author of Mechants of Doubt along with Naomi Oreskes, where he makes a similar point -- in a democratic society like America, we can use the information that AGW is an accurate and descriptive theory, that if left unabated our emission of CO2 will cause potentially dangerous warming in the future, but decide not to do anything about it. Or we could create the ubiquitous "one world government" that denialists are always blathering on about. The issue is, as you imply, when people believe that one particular policy decision for dealing, or non-dealing, with climate change must necessarily follow from the science. Denialists are certainly guilty of this, but so are radical environmentalists. And even realists, even scientists are guilty of it as well. But this is *rarely*, if ever, the case.
As part of the small minority of conservatives that accepts the realities of anthropgenic climate change, I have long argued that my "colleagues" would do well to enter the policy debate. So far, the voice advocating policy has really only come from one particular side of the aisle, and more likely than not, you're not going to like what they have to say. But science doesn't support cap-n-trade any more than any other strategy.
I, for one, don't believe that an issue like climate change reveals the failings of the American system. Rather, it could very well be the opposite.
EDIT:
Conservatives and republicans denying AGW because of "leftist" policy implications is really a self-fulfilling prophecy of sorts. As long as repubs continue to deny the overwhelming scientific support for the theory of AGW and its consequences, and refuse to even entertain the idea that something needs to be done about it, the left will continue to dominate the policy discussion with "leftist" proposals. And more than that, as long as they deny, demand will never be large enough for the free-market system to effectively and efficiently deal with the problem.