[criticaljudge]

Then as I suspected, it is just mumbo jumpo to allow people to make demands (I created the "value", so I deserve that thing).

Again my question, what is the actual use for the concept? If you can not use it to determine price, what is it for?

And there are still examples that show how useless it is, like an apple has no value because it grows by itself? But apple juice (or sugar extracted from apples) has more value than an apple, because labor is used to extract it from apples? What possible use could be for that metric (and what is the unit of "value" - a vague feeling that stuff is owed to you?)? Even though the nutritious value of an apple is higher than apple juice or sugar?