Exactly.  Markets don't just magically solve problems that we hope they would.  Rather, they optimize whatever result is dictated by incentives.  There is in fact a market that has fixed this for those who choose (and have the means) to participate.  For the vast majority, however - who either don't know, don't care, or have no viable alternative - the dominating incentive is price; not health.  And, better prices are overwhelming a result of government intervention in favor of shittier food.