Considering the volumes of text people have posted about why life drawing is better...I can't fathom why you promote a learning tool which is clearly inferior.
Prove why tracing is not a worse way to learn. Put your money where your mouth is, since you can't seem to post anyone else's work that's been improved through tracing.
This is the gauntlet at your feet: pidgeons in a week. I propose that I could learn to draw pidgeons (universal pest it is) better through life drawing than you could through tracing. At the end of that week, we'll see who learnt more about how to draw them by doing the same 'commission' as proposed by the AD. To finish in an hour.
What say you?
And in case you want to accuse me of having any unfair starting advantage, just ask and I'll give you the link to my (amateur, anime) stuff, or even my current timetable.