Does age matter when it comes to advising someone (about life)?

So my older sister and I had a little argument. She is 2 years older than me and she keeps telling me not tell her what to do in her life (which I don't think I did, more like of an advise). She is in Europe, away from the family and alone. She just started working there for a few months. I would always tell her to take care and to save for herself and remind her to be financially stable as she is alone in there. I never asked her for anything in return as I don't really want to rely on her. I want her to have the best things in the world. But she keeps telling me that I am not old enough to advise her or tell her what to do. She also wants me to address her friends with honorifics (in our country, we address older people with honorifics or titles, but not really required).

Anyway, I am one of the persons in this world that believes that age doesn't really matter to advise someone in his or her life, (edit: although experiences indeed matter). In my defense, I told her that we are only 2 years old apart and I do believe that we have different companies in life (I mostly work and have friends who are a lot older than me, while her friends are just her age or a little older), like even if she's older, our experiences in life isn't really apart. So what do you guys think? What are your thoughts about the subject?

EDIT: All opinions are welcome. Not fishing for people who will agree with me, just to be clear.