Op, the human body wasn't designed for the life we lead now, sitting at a desk all day, driving around in cars, eating processed rubbish and drinking alcohol.
Those women who didn't die in childbirth would have still been hunting/farming, keeping up with the rest of the tribe until they were physically unable. They would have taken a supportive role.
I had ds at 45, yet don't have any of those symptoms.
I'm 63, cook from scratch, eat 30 different fruit & veg a week, seldom drink, run at least 20k a week, cycle, practice martial arts, do a lot of veggie gardening.
My menopause was a couple of night sweats in my 50s. My pelvic floor is the same as it has always been, my bone density is normal, plenty of energy, everything else is normal.
I think as you get older, you have to go back to basics and support your health by keeping it simple. Which some might think is a bit boring but it is better than feeling ill.