Indeed, freedom first of all, i think we all agree here.
But he isn't asking people to stop buying or drinking them, he's just asking to change a game mechanic so that people will be free to drink a pot in desperate moments but won't be able to buy completions, cheapening every kind of achievement.
Saying that turbine will never change this cause they would lose money doesn't make the OP argument less valid, it just shows how deep we went into a p2w game..