You honestly dont even need a reason. I wanted a csection and they fobbed me off all the way through, I eventually agreed to an induction because they started overloading me with all these risks saying they were just trying to help me make an informed choice - an informed choice isn't just being aware of risks though, its being aware of the benefits and any risks with the alternative choice which they glossed over. Anyway my induction went tits up, probably because I was so stressed and I ended up having an emergency csection in the early hours, no chance to get my head round it, almost didn't manage the spinal and we didn't get any photos because we were in such a daze we didn't pick our phones up. My midwife was so angry for me that I'd been told no, she said that's not allowed anymore
If we have another I will be so much more firm from the start, I knew it was the right choice for me but I backed down. You don't even need a list of reasons if you can't think of any, you can just say 'I want a csection because that's the right choice for me' and if they try to pick it apart just double down, 'this is my choice, I'm allowed to choose how I give birth'.