The so-called Subjective Theory [which I shall subsequently call the theory of marginal utility] has absolutely nothing to say about the underlying essence of value...
THAT'S the most important part of your post...
Nice cut-and-paste work, but the part you left out indicated that determining "the underlying essence of value" wasn't usefull in real word economics.
Perhaps YOU'D like to enlarge upon WHY (use-)value is NOT useful to 'real word economics.'
In other words, TMU has no propaganda value for socialists and Marxists.
Although the fact that it DOES have propaganda value FOR neoliberals and other assorted capitalist vampires doesn't seem to bother you in the least...
The LTV has propaganda value, so we are going to stick with it . . .
Well, Don, at least Joel explained WHY he believes what he believes---like SDF explained his beliefs, RD explained his, and I explained mine.
How about you explaining YOURS?