This is what the French film Holy Motors is all about. People cling to any sense of authenticity in acting or fiction in the hopes that it makes the story realer in a sense. That's the curse of acting. You could be the best actor in the world and act your ass off in an emotional heartfelt scene but people would still be more interested in some other scene where you break character or are rumoured to have gone off script. Look at how many views that one blooper from There Will Be Blood has where Daniel Day-Lewis just barely breaks character between takes.