Minor was considered a reach by much more than that. The Braves don't have magic pixy dust that makes their scouts 10 times better than everyone else. Other teams FO were surprised by our pick back then as well, not just BA, BP, and company. And it's one thing when you are talking about a high school player that hasn't been seen that much, but this was Mike Minor. He played at Vandy in a major college conference and was seen a crap ton. All the scouters saw him far more than just a time or two. Hell, I had watched him multiple times myself since I am an SEC fan and had plenty of opportunity. When you are talking about high school prospects I would agree with you that professional scouts are going to have a big leg up. But college prospects are far more extensively scouted. Minor was not some mystery prospect from a high school in the NE, he was extensively scouted by everyone.
He was considered a prospect with a very high floor and limited ceiling, who would likely top out as a #3/#4 starter type due to not having ridiculous stuff.
And gee, guess what? That's what he has wound up being so far.
And none of that changes the point that those writers who are responsible for the most widely recognized pre-draft lists have VERY few opportunities to see those players with their own eyes - they're relying on many of the same reports and video clips we do.
For example - everyone loves to talk about how unbelievable it is that 23 teams "missed" on Mike Trout in the 2009 Draft. Guess where he ranked on BA's Top 100 Draft Prospects that year. 22nd behind guys named Strasburg, Dustin Ackley, Shelby Miller, Zack Wheeler, and Mike Leake - those are the handful of guys who have had moderately successful careers to this point, and none have been significantly more successful than Minor. The jury is still out on many of those players six years later, but Trout has been the only "star" that was ranked ahead of Minor at #35. Of course when you look down that list in retrospect today, it's easy to ask "what were they thinking?" because the further down you go, the more successful players you find. Wil Myers was #31 that summer, and James Paxton (#37), Randal Grichuk (#58), Jason Kipnis (#61), Jake Marisnick (#71), Kyle Seager (#97), and Billy Hamilton (#98) were all ranked lower (in most cases significantly) than Minor was.
However, when you look at where the players were actually drafted, the teams' results look better than the BA list - Strasburg (#1), Ackley (#2), Wheeler (#6), Minor (#7), Leake (#8), Miller (#19), Grichuk (#24), and Trout (#25) were all taken in the First Round. Paxton (#37) was taken in the Supplemental Round (did not sign) along with Garrett Richards who didn't make BA's Top 100. Hamilton (#57) was taken in the Second Round along with Kipnis at #63 which was right where they had him ranked. Of course that Second Round also included Nolan Arenado (#59) who didn't make the BA list either. Seager went 15 picks higher than BA had him ranked (in the Third Round). The only players that actually "fell" in the group were Myers (#91) and Marisnick (#104).
The point still remains that Callis, Mayo, Law, and Sickels miss at least as often as (if not more than) the organizations do - especially the ones who have historically had good scouting departments. I agree that a big part of that is the high schoolers, but that just strengthens my point - the teams who come up with the "finds" who aren't on the major lists (especially earlier in drafts) are the ones who consistently rely on their scouts rather than the blanket lists.