How long have babies been around?

There's a story on the AP wire this morning that 7 companies that manufacture cribs have recalled about 2 million of them. Design flaws have led to the recall. The movable slide can detach or "malfunction" (?!) leading to babies' heads trapped, injury or strangulation.

Humans have been placing their babies in cribs for how many millennia now? Their physiology and frailty long ago fully studied, documented and understood, yes? Why is it that in the 21st century some nitwits can't figure out how to design a crib so it does not kill the person using it? Who do they think they are, the tobacco industry?