All I can say is The Big Brain Economists have said that "the labor value theory is absolutely bunk and has no basis in reality." Along with "only marxists believe this drivel."

I'm not A Big Brain or an economist so I can't say why they say these things, but I have seen a lot of pushback on this concept. I think it all comes down to the "agreement" we make when we accept a job, not that we have a choice. "Not working" is only an option for those that are already rich.