Is it because authenticity leads to a better artistic production value or is authenticity an end to itself? I hope I'm not being insensitive or flippant. I'm j

Is it because authenticity leads to a better artistic production value or is authenticity an end to itself? I hope I'm not being insensitive or flippant. I'm just hoping these discussions leads to some sort of insight or solution. It's definitely super educational for me. In other words, if 2 actors are playing this super emotional scene with equal artistic expression and actor A can do it well because he deeply connects with the characters experience and channels his own life's pains and struggles through the expression and actor B can't relate at all with the character but just trained super hard to be able to play any sort of role, is actor B a less desirable path for people wanting to become an actor? I realize it's a bit of a wonky analogy because the painter in this case is both the actor and the screenwriter. Just trying to figure out if self conviction is a means to an end or an end to itself.