Hello, Steven.
Respectfully, I disagree. Also what we have here is a play of words. Familiarity, what is meant in other words would be so even if one is knowledgeable of the thing - be it anatomy or otherwise.
Knowledge itself of a form (anatomy for example) does not make one an artist. Understanding the choreography of line it is exactly what I am talking about. This form of practice teaches you to be familiar or to become, to a certain degree, knowledgeable of anatomy, in a limited way.
Yes, one might recall from repeated tracing attempts the curve of a line, the placement of landmarks even, shape of a feature and so on. This will help, and I agree it will help. But it will not teach the fundamentals of drawing. Tracing will not teach this, but drawing will or painting will.
You mentioned the piano; I have been playing the piano for 30 years and have taught as well. I have had those that have strong ability or training even in the reading of music, who, however, couldn't play at all. They would say they always wanted to, and even tried, but wish they had someone to teach them. Did they learn faster? Yes, in some cases they did; because they were familiar, I could go right to teaching them the fundamentals without having to teach them to read the notes in front of them. However, amazingly, they had to start just like all the rest, and learn where those notes were on the piano, and the scales, and so on. They had to go home and practice the same things the others did and were graded in the same and so on.
Also, for many years I was a Karate instructor, and have trained children, adults and even law enforcement. I used to love it when many of the teens I taught would come in thinking they already knew so much. I mean, they saw someone, or watched TV, or read a book, or saw a training video, or even had various Martial Arts magazines with step by steps in it. From this they felt they had learned so much. TRUE, they were familiar but when it came down to execution they had no concept. Point being, they had to be taught just as anyone else did and in most cases even unlearn improper techniques.
From my experience, I don't see it as a benefit, but as I said before it is my opinion - take it for what it's worth.
Mark