I’d even argue the opposite. I think when actors are fans of the stuff they work on it changes their approach, and not always for the better.
Many of the actors on Star Trek series in the 90s (TNG, DS9, VOY) were not actually Star Trek fans, hadn’t watched the show (I think some hadn’t even heard of it before hearing about the audition opportunity), and just approached their roles as actors approach any other parts. They said in hindsight that if they were fans of the show and realized how popular it was they’d be too nervous to play their characters effectively.
Now it sounds totally unfathomable that you’d be able to find actors who didn’t know anything about Star Trek!