Women didn’t live for decades in those days so most women were procreating and thus lactating a lot. They had to.
Yes exactly. Natural women lived very different lives than modern ones.
For instance they had a few periods in their lives. The monthly period is an effect of birth control. They also were lactating most of their adult years.
I have sometimes wondered if the big breasted fat woman statues were of a special person in the tribe. A woman who the families paid ( food) tribute to so that if lactation failed or if a mother died, the babies would have someone to feed them.