They care. They care very much. But, they want the fix to be easy and convenient. Therefore, what we get are foods that people _think_ are healthier, but actually aren't. Why do they think they are healthier? Because producers and advertisers convince them of such. (Think whole-wheat/grain pasta.) The reality is that the truly healthiest food options are also the least-processed. But that reality doesn't sell because it requires too much effort and "sacrifice" on the part of the consumer.