Bullshit about the babies.
Babies drink milk all day, 24 hours, app. every 2 hours.
I remember when my son was born i calculated how much protein he gets per kg of his bodyweight, and came out at about 10g of protein per kg of bodyweight.
Kids get way more than 2g per kg of protein easily every day, just one cup of milk gives about 10g of protein, for a 10kg child, and if you know kids and how much they eat, compared to an adult and their own bodyweight, it puts any bodybuilder to shame.