I agree to a certain extent, although letting the market alone decide how we proceed is a pretty dismal solution.
Look at what is happening now. The companies in the US have decided that ethanol is the way ahead. Ethanol is a good solution for them, but a rubbish one for consumers. Yet what else are they being offered? The whole point of ethanol is that volume of sales are at least doubled, and the type of vehicle is not addressed.
If you let the market choose the solution, you are delegating the choice to those who have the market cornered. They choose what suits them, which is not always the best solution. They also have well developed marketing strategies which means that the man on the street is generally not aware of any other options which might we worth looking at.