Am I crazy for not having a birth plan?

Kristen • 20 year old passenger blimp
I'm 29w tomorrow and I'm not sure if it's even logical for me to have a birth plan yet. I'm not aware of an early baby in my entire family (no little babies either, prayers appreciated). If it was a perfect world I'd like to go as naturally as possible but one of the OBGYNs at the practice I go to said he's not pulling out a 10 pounder and that "we're not cowboys". My baby daddy was born 14 pounds 15 ounces and I was 9 13. While I don't know exact details, I know I don't want to go under the knife for something people have been doing since the beginning of time (exceptions for safety purposes of course). I feel like I just don't have enough information to make that decision yet. Anyone else feeling the same way?