How common is it to have a healthy pregnancy only to end up with a complicated birth?

I never thought I’d have children because I’ve always been afraid of dying during giving birth, but here I am in my last month of pregnancy and freaking out. I saw a Reddit thread recently about near death experiences and it felt like an overwhelming amount of comments were from women who almost died giving birth. I’m unsure if they were high risk or had other health issues that contributed to this and I’m curious, if one has a completely healthy pregnancy without any complications, how common would it be for it to end up in death?