You are disregarding the fact there are even politics in pro sports. When you have an undersized guy (and let's be honest, TH isn't close to 6-1; Brady looked a full head taller when they went to shake hands) that came from a nothing program, sigma/bias will work wildly against you. When you look at Romo's early history, it's crazy. The guy was almost cut for Quincy Carter! It took 3 years and a threat to leave to New Orleans in order for him to sniff the field.
I 100% agree that generally the cream rises to the top, but you need to have an opportunity to rise. The vikings was his best hope, but that was in year 1 out of college, he got hurt, and it is understandable the franchise didn't want to waste time on a guy that was on IR for like 2 years. After that, he was behind Brady, Watson, and Newton --- and he still rose the ranks after Newton was hurt and impressed the staff so much, well, he's here now.
Personally, I think when evaluating the depth chart and investment of a player, overall performance should be considered greater than what other teams thought of the guy. But that's just me.....
I am with you that this game finally got me excited about this team. I have been 100% dormant for nearly 6 years. TH woke me up. To not give this dude a chance to compete for QB1 would be insanity. That said, we would absolutely need to invest in multiple QBs as his injury concerns are 110% valid. In looking at all this, the redskins have screwed up much easier decisions, so as long as Snyder is the owner, my expectations on their ability to correctly handle this are next to 0.