And besides just because something has been done a certain why for a billion years, doesn't mean a better way can't come along to make things better.
It does teach you that a child doesn't always bite because they are being mean or agressive. And the child is not being a "monster" or a "savage" but a normal child.
It also doesn't mean whatever is "new and recommended" is better either.
As far as your quoting Dr. Rosemond's use of the word savage, some of the definitions listed in the Free Dictionary for savage are "To attack without restraint or pity", "Lacking polish or manners", and "Not domesticated or cultivated". Obviously, there are other definitions as well, but his use of the word savage doesn't have to be taken as an insult.
I've taken Child Development classes as well. I certainly can cite the stages of development with the best of them....
Strangely, as a parent, I find that learning from me elders and my instincts are exponentially more useful than anything that is learned in a classroom. I've found in my lifetime (which is longer than I choose to admit....I was a "mature" parent) that I've met plenty of rotten parents who have had lots of "Child Development" classes and lots of fantastic parents who haven't had any "formal" classes.
I tend to agree. My mother never took one child development class in her life (as I said earlier, I have a bachelor's and a master's in education so I certainly have), and she reared two law abiding hard working children who knew better than to throw fits and misbehave without knowing full well there would be consequences.
I have other family members who were also reared that way, however it's interesting how the more educated a few of them got (not most by any stretch), the more psychobabble they produced, and the more obvious their own children's behavior deviated from appropriate behavior (always with the proper excuses, of course).
Nobody is saying that biting isn't a part of some children's development (certainly not all though), but we are saying it needs to be stopped. To quote Dr. Rosemond's article,
"Why are so many of today's 3-year-olds still acting like toddlers? Because their well-intentioned parents/caretakers employ discipline that isn't powerful enough to turn the trick, that's why."
Nobody is advocating child abuse, but unfortunately, people have gotten to the point where correction of inappropriate behavior is viewed that way. I see it in schools every day and in public places as well (restaurants, theaters, etc.). JMHO
ETA: None of this applies to daycare workers, of course, because they don't have that authority.