Read my parent comment. Labor does not equal value by how most people define it. If I can labor for a task that people don't find valuable, like rolling a rock uphill, that means people intuitively feel some sort of subjective theory of value that's not connected simply to how hard someone worked. Hence, LTV does not make sense and we must find a different theory of value. Now, you can disagree that capitalism is not such a theory, but you ought to be able to agree that LTV ain't it, chief.