You misunderstand the absolutely beautiful concept of the The Invisible Hand. It refers to the self organizing (emergent) behavior of the economy and it's many

You misunderstand the absolutely beautiful concept of the The Invisible Hand. It refers to the self organizing (emergent) behavior of the economy and it's many benefits. The concept itself makes no assumptions about perfect information, quite the opposite - it describes the coordination of individuals with vastly different information sets (as well as resources, capabilities, etc.). Did you ever think about the absolutely enormous amount of coordination required to product the computer you type on? Most of that is the invisible hand. It is very much a real world concept as comes from Adam Smith's observations of the world around him. You might want to reread the Wikipedia article you linked. The debate is all about when, how and for some even if the invisible hand can be improved on. Medical care should be a particularly difficult area for the reasons you list among many others. At least so far the results of efforts to improve on the invisible hand in US medical care have been mixed as the examples in the OP point out.