Are you on the younger side? Generally younger people want to be older mostly to be able to do more adult things or have the things in life older people have built over time.
Getting older isn't just looks although that is just a matter of personal preference. There are health concerns and things like lower energy. Taking care of yourself helps a ton but sometimes you get bad genetics or some kind of aliment anyway. And age will eventually catch up with most people.
I do still recommend things like exercise so you can feel 30 at 60 instead of 60 at 30.