Two of Henry VIII's 6 wives - two of the four who actually gave birth - died in childbirth. As did his mother.
Queen Victoria was only Queen because her cousin died in childbirth along with her baby. She is often criticised now for her dislike of pregnancy and childbirth - but probably much of the reason for that was because every time she got pregnant she was worried that she might not survive the pregnancy.
Newly pregnant women often had their portraits painted so that their loved ones would have something to remember them by if they died, as everyone knew there was a high chance of that happening.
'Natural' childbirth might just be safe if there are no complications, but we all know that there is a high chance of things going wrong; if they do, mother's and baby's chances are vastly higher with medical intervention. It is so easy to be complacent about the past and disregard how dangerous life really was, and just how much safer modern medicine has made this process.
Those who promote 'free' birth are just the same as those who scaremonger to anti-vaxxers; they are evil.