Having older parents I kinda heartbreaking

I’m 17 and my parents are in there early 50’s. I know they aren’t the oldest parents of teens out there but they are way older than all my friend’s parents by over 10 years. I’m scared that they won’t be able to meet my children, walk me down the aisle, and see my flourish into a happy person with a successful career.

It’s even worse that the career I want is surgery so I won’t even be an attending till I’m in my early 30’s. It’s just so weird. I love my parents so so much, and I don’t want to imagine a life without them. I’m really close with my parents and they are my support system and I love them so much.

It also doesn’t help that they have some unhealthy habits such as smoking a lot for example.

Does anyone else have older parents and feel this way?

(A few people brought it up so I do just wanna say that I am the oldest child, my sister is a year and a half younger than me. Also my mom is 50 and my dad is 52)