[rakoo]

> If maximizing value is not the goal, then why should Marxism redefine value in a counter-intuitive way?

Because it's only an exchange value and doesn't take into account the myriad of things that also have value but are not a consequence of work ? And the goal of Marxism might not be to maximize exchange value ?

> In Marxist societies people are in charge that pretend to have the laborers best interest in their hearts

Hard disagree, looking at societies applying values evolved from Marxist theories I see people in charge of themselves. I think of the old Commune de Paris, of the Spanish Revolution, of the Rojava. You need to look further than the one example you have in mind.