So you're saying it's all about the concept "vital" and I should pay that more heed? But I don't think the term "vital" solves the problem of information. Natural, vital, optimal, feasible, wanted, it's all the same question, which is, uh, "how should we specifically cooperate," I guess. Government just knows less about this than the people involved do. Hayek yek yek.
Maybe you mean that in desperate situations - such as working out what to do about roads - we might as well resort to government. We do, so I guess you're right.
Good regulation doesn’t completely avoid market mechanisms it tries to tame the more brutal ones in order to maximize return to society. The roads argument is important because without roads we do not have any trade. So by collectively and somewhat proportionally, to use and income, managing the cost of road it makes everything else the market does possible.