The free market is not omniscient, nor moral, nor immoral. It’s the absence of impedence. It does a good job because it allows consumers to vote with their dollars. If there is a need for wrenches and you invent one, and the price is fair, it will sell. But I come along an make an industrial-strength wrench that will never break, or an inexpensive wrench for those who will use it lightly and seldomly. This is where the free market excels. Everyone wins. If Joe Blow tries to capture the lower end of the market with a super cheap wrench, but it breaks too easily, he won’t be around long. The free market pushes him into oblivion. So, as the “unseen hand” of the free market works it’s magic products get stronger, smarter, cheaper, etc., giving more people a product that better addresses their specific needs and desires.
So, that is what the free market is and does. Your question, I think, is more along the lines: “Given that there is the force called the free market, should we not seek to have it work in a way that betters our society?” I think few people would argue with that. Of course, they may quibble over what “betters our society”.
To answer your last point, consumers do not have to be “educated” for the free market to work. It will always work based on whatever the knowledge level is. Now it does always behoove individuals to be better educated about their choices, so they are making more informed decisions and getting the most of what they want with as little of what they don’t, including cost, but not exclusively. For those who personally see value in those things that benefit society in the long run, I’d say you would be correct. But then we are into degrees and trade-offs. I might value, say, a car that pollutes the air less, and all things being equal, or near equal, I will buy a car that fulfills that desire. But if the cost of a less-polluting car is ore than normal cars, I have to weigh two competing desires. Actually, a better example might be safety. Everyone values it. And few people would disagree that a big Mercedes is safer than a small, cheap car. But plenty of people by smaller, less safe cars. Heck, sometimes the same people buy both.
I think I’ve moved into rambling mode, so I’ll stop here. I hope that helps some.