Why don't you understand that for some women the enjoyment from anal sex is enough to warrant the small risks to their health.
Some people don't find their children worth the lifelong damage child birth can cause
I think many on this thread could do with reminding not everyone thinks the same way as you. Not everyone has the same priorities, passions and pleasure spots.
There are people out there who love free diving, doing dangerous manoeuvres in flight, travelling to countries that are dangerous.
People do their own risk vs reward analysis
The key for that to be done properly is balanced and factual information to help them make those decisions.
People on this thread who enjoy anal sex, do so knowing there is a risk to their health. That risk is worth it for them.
I actively chose to have C-sections with all my children as nothing is worth being torn front to back.