If there aren't busts, flame outs, or bums that were given this heavy solid medal prior to the draft then why isn't Bryant EVERYONES top pick?
Because of the mythos of the ace. Aces are the quarterbacks of baseball. They get the headlines. The game, for a lot of the media, revolves around them.
This touches on it, but it is really a much more complicated issue than that. If Bryant were a sure-fire 3B, he'd be regarded even higher by most. However, many people think Bryant is a corner outfielder, and that greatly harms his value. There is also concern over the quality of pitching he is facing, and that puts doubt in the minds of many. It's easy to judge pitching in a vacuum, but judging hitters depends greatly on who they are facing and where are they are playing.
Guys like Appel have the "Ace" potential tag thrown on them, and while that does generate media hype, it's for a good reason. There are only about 10 Aces in baseball, and the only way to acquire them is through the draft or a trade that depletes your farm system. A guy who can throw 220+ innings with a high-2's/low-3's ERA is an extremely rare commodity, and has the ability to provide enormous value to your ballclub. Bryant may be low-ish-risk and good-upside, but you can find those players in free agency and through trades. Aces and #2's are extraordinarily rare and very difficult to come by, and if you get the chance to acquire one you're going to be very tempted to take that risk.
TL;DR: Aces are not available in free agency. Power-hitting corner outfielders are. I guess I really just take issue with you calling it a "mythos" in what reads as a mocking tone.