The market does not always choose to use the maximum amount of automation for everything. For example, a small business may rationally choose to wash dishes by hand rather than paying for a dishwasher. Are their meals more valuable (because more labor intensive) than the big restaurant across the street that does own a dishwasher?
You are the one defending the LTV, not me. If value = labor, but not when that would be silly, it's a bit like saying F = ma, but not when that would be silly. No serious scientist would accept this formulation. You would be laughed out the room.
After millions of deaths, environment devastation, and political repression, Marxism deserves to be laughed out of the room as well. I hope it will be, some day.