My baby beefcake weighed 9 lbs 13 ounces at birth and let me know loud and clear when he was hungry.

I never had to wake him to eat and I never would have since he was healthy and growing.
Like many have said, unless your child is unhealthy or low weight it is probably not necessary to wake an infant to eat.
Julie Chin is very petite and never got too big during her pregnancy so I wouldn't be surprised if her son is on the smaller side. I suspect that's the reason for having to wake him.
Parenting is so intuitive. It really involves relying on what you know is best. Parents truly do know the most about their children. Doctors are there to advise, but I certainly don't do everything they say. For example, many doctors advise against practices like co-sleeping, which was really special in our household. Thankfully I have a supportive doctor who never told me what to do, but that is not always the case.