No, that's not what we say. The primary argument for it is because we do not subscribe to a utilitarian morality. If we know that some decision leads to better outcomes from the POV of general quality of life and the like, we still wouldn't support it if it trampled individual freedoms, because we consider the latter to be more important.
It's not a difference of opinion over whether a certain theorem proves true or false. It's a matter of different set of axioms altogether.