> Without prices it's not possible to measure the "value" of goods or services. Which is the same thing as saying that without prices there's no "value" generated.

It's really, really not the same. Just because you can't measure something properly, that doesn't mean it doesn't exist.

Just how absurd that thought is becomes obvious when you translate it to a different topic: Magnetic fields did not spontaneously begin to exist when humans started to be able to measure them accurately, for example.

What it does mean is that we don't have as good an understanding of the concept of value as we have of electro-magnetism. That's not surprising, of course, since the inherent complexity of the notion of value is much greater.