jemaz: I note that you have directed your post to BobbleheadDoll but he also is blocked so I cannot comment to his contribution to the discussion. Your observation about coaches taking refined players with innate ability as opposed to unrefined players with innate ability brings up a couple of issues. First, all players have some degree of innate qualities. It is a matter of degree. It would be a rare baseball team indeed that has all excellent innate quality players.
So then the issue faced by the HS coach becomes whether to take a less polished player with greater innate qualities or a highly polished player with lesser innate qualities. The question is how polished and the degree of the innate qualities.
I grant you than many, if not most, HS coaches live for the moment and may well take the more polished (glitzy) player with the mistaken notion that the greatness of their coaching abilities will make the difference. Generally they rue that decision. I have seen time after time where the coach keeps telling himself, and others, that any moment now this player will come out of his slump(s) and be the next coming. It doesn't happen and he cannot figure out why. These coaaches believe that you can improve innate ability in the same manner that you can improve learned skills.
Another issue is the inability of a HS coach to recognize a diamond in the rough causisng him to accept a flashy lesser quality player. Some of these kids survive a year in JV before the coach figures it out. These kids on the bubble boought themselves an additional year by accelerated skill refinement obtained in a number of scenarios.