While I understand what they’re saying, they don’t take into account the moldability of the human skull during infancy.
The Flathead Indian tribe was named that because they engaged in the practice of “flattening” their skulls. It was done in infancy, by binding the skull.
These days, what I see most often are babies with the backs of their heads flattened since putting babies on their backs to sleep is promoted.
After heartily ignoring this aggressive, ominous and obnoxious assertion with twelve babies who all slept well and never got earaches or any other sickness, I'm convinced it's part of a conspiracy to make people hate rearing children from day one.