So basically you made a point that everyone already knows, you didn't give some ground breaking revelation that no one already knows. Basically all you did was tell us the sky was blue. So the point you were trying to say is the Bears should continue to settle for the mediocrity that is currently on the roster or draft for mediocrity which would cost a whole lot less in the nearer future.
So you list two teams that have hit the jackpot twice and you wonder why the Bears haven't been able to do that? Even if the Bears were to tank and have a the #1 pick your list shows that even the #1 pick in the draft is a crap shoot and isn't a sure fire elite QB...see Smith, Alex and Russell, JaMarcus.
The problem you are having is you are wanting an instant phenom instead of having the Bears do the one thing most teams have to settle for...actually developing a player. The QB's that were listed are young and are still learning the NFL style of play. You made the point that the QB position is one of the hardest positions in the NFL and that only a fraction of the players that get drafted actually go on to succeed.
Go back and look at Drew Brees' first 2 seasons as a starter, look at Roethlisberger's first 3 seasons as an NFL starter, Look at Brady's first season as a starter, hell even look at Peyton Manning's first season as a starter. A lot of QB's need time to develop, some take more time than others but they do need more than 2 years, so before clamor that Glennon, who has looked solid in his first two years as a pro, is some garbage player at least let him get another year under his belt. Not claiming he is the next Brees or Roethlisberger, just saying he doesn't look as bad as you claim he is.
And after all this "no shit" manifesto you just typed you came to the same solution that there is no solution and that more than likely teams will have to settle for good to above average players unless they get "lucky" enough to have a shitty season in a year where there is a surefire HOF QB coming out.
You just named players that have been in the league for 10 plus years.
That luxury is over. That's for proving my point.
Yes, the sky is blue. Elite QBs don't grow on trees. There has been 1 to come into the league in the last 10 years. And he was a #1 pick and arguably the most 'sure thing' to come out of college in the last 20 years. A once in a generation guy.
So, we go with your scenario - grooming a guy. Ok, great. Look at the guys over the last 10 years. Do you see any that are being groomed to go on to have enough success to win a SB? I don't. Wilson was the only notable exception and no one saw that coming. There are surprises (like Brady) and Wilson was one of them.
The Bears had many holes to fill. They didn't have a first round pick for two years. They had very significant holes to fill over the last few drafts and couldn't afford to take a 'take him or leave him' QB with a mid first round pick. It's the conundrum of a middle of the pack team with problems.
The days of a talent like Aaron Rodgers collecting dust on the bench learning from a HOFer are over. That NFL doesn't exist anymore.
The NFL of 10-15 years ago was one in which guys like Brady or Roethlisberger or Rodgers could get their sea legs about them. Unfortunately, the NFL is win now league and young mid-talent QBs are thrown into the mix and most suck. None of the mid round guys are having any impact of note (Wilson being the only exception and he was fortunate to a) come into a team with a TON of talent on both sides of the ball and b) have a unique quality that the NFL just wasn't and really isn't to this day, capable of accurately defending).
I look at the current crop of college QBs and none excite me. Same goes for last year. Does a mid round guy like AJ McCarron or David Fales excite you? Is that the guy to bring the Bears a SB in a division which he has to get past Aaron Rodgers? Hell, even guys that looked like they had all the NFL tools - Matt Barkley for example - go on to be just 'meh' guys.