[betwixthewires]

Well this presumes two things, one, that there are no valid arguments against cap and trade, and two, that propaganda against cap and trade is not effective. But both are true. Plenty of people do oppose cap and trade simply because those influencing their political stripe loudly oppose it, and plenty of people have valid concerns about what the effects of such a scheme would be and potential downsides to it.

One particular argument would be that there would probably be all sorts of exemptions and subsidies so as to make it ineffective against the largest producers of CO2, which is a version of "I don't trust the government to do something smart with my money," making it not a moot point after all.