The trouble with Experts is that you can have a room full of them -- and a room full of differing opinions!
I have also seen "newbies" who have out-shot "expert archers", many times. How did they do it, you might ask... With talent, skill, proper equipment (bow AND arrows), attention to detail, a smidgen of "luck" and some really good coaching from an excellent teacher! Some of them didn't need to shoot more than 800 arrows, either.
I admit, even after 20+ years, I still can't shoot like that, myself.... Hey, I have never claimed to be an Expert.