Again we are making the assumption that people had many children BECAUSE there was high infant mortality … this is not true … Many of the people had no idea of what “infant mortality” was or represented and they definitely did not consciously work out a method to mitigate a risk of child loss … they simply lived their lives and had children.
And then today modernity brings us technology which gives us a false sense of security that children will survive until that is they cross the road or get shot in the street … The affairs of life are in His hands.
The people who do not want to have children out of fear of quality of life are going to lose out.