I think there is a conflation between different types/definitions of "value" that always runs things off the rails. Economic value is a distinct thing that arises from markets and price discovery. It doesn't really cover social or personal values, despite them constantly leaking into discussions.

Pretty much everyone agrees teachers are valuable, but their economic value is relatively low or their market is distorted. As hellishly capitalistic as it sounds, a teacher that could reliably produce all star workers would probably be paid handsomely as a student conveyor belt to Megacorp, by Megacorp.

Also medicine breaks discussions of markets/economics, the value of a shot that saves your is infinite.