I can sort of agree, insofar as I can't myself direct the government to never under any circumstances actually do that, and I can't sequester an Industrial Revolution's worth of CO2 just by being aware of the problem, but I feel like it misses something. Not everyone is going to be equally unable to meaningfully contribute to solving the problem -- if a high baseline level of meaningful-awareness of an issuye is the norm, it seems like society is more likely to get the benefits of "herd immunity" to that failure mode. It's not guaranteed, I wouldn't call it a sufficient condition by any means for solving the problem, but it's increasing the odds that any given person whose potential influence over the activities of society is great might be better prepared to respond to that in a way that's not terribly productive.

I suppose if you think we'll get FAI soon, this is irrelevant -- it's a whole lot less efficient and theoretically stable a state than some superintelligence just solving the problem in a way that makes it a nonissue and doesn't rely on corruptible, fickle, perversely-incentivized human social patterns. I'm not so sanguine about that possibility m'self, although I'd love to be wrong.

EDIT: I guess what I'm saying is, why would you NOT want information about something that might be averted or mitigated, but whose likely consequences are a severe change to your current quality of life?