Never underestimate the laziness of a new parent. Especially after their first child. The laziness and apathy grows with each child. Have you ever met the youngest of nine children? They are the most independent, strong people because their parents practically let them walk around the city at age three. Parents with their first child get lazy out of desperation. They're working way too hard not to give up every once and awhile. By the 9th child they're lazy by choice. That's just your life. Your energy has been exhausted anyway. Nothing more than a husk of what once was.
Nothing strengthens a baby's immune system like crawling on the dirty floor, collecting every particle and speck of dirt. Might as well have the butcher babysit the baby. It can clean the floor of blood and meat particles too!