Does seniority actually matter?

I'm a seasonal hire with 4+ years experience in print shop (not only through office depot). Recently our print manager got promoted so the position opened up. One girl who has been there for over a year is basically going to have it handed to her. I just want to know if its even worth applying since I have the experience and already know basically everything about ny store or if I should just let her take it. 🤷🏻‍♀️