Isn't a 29 almost 30 year old too old for a 19-22 year old boy band group?

My friend likes this boy band called PRETTY MUCH. They're 19-22 years old. She is almost 30. She's too old to go to their concert. It's for YOUNG girls like me! I'm 17. It's for people under 25. She needs to listen to people her own age.