see this is one reason i favor paying Dak now,our inability to scout QBs,even Dak was drafted as a backup.We have a long history of drafting duds and being associated with failed QBs for a long time since Romo emerged.
Since 2000 (Aikman's last season), the Cowboys have drafted 4 QBs (plus Isaiah Stanback, but I don't count him), tied for fewest in the NFL (the average team drafted nearly 8 QBs over that time and 6 teams including the Patriots drafted 11 or 12). Carter, McGee, Dak and White. The team they're tied with is the Colts, who of course had Manning through most of this period and then after a one-year lull got to pick Luck.
It's not that the Cowboys draft duds, it's that they simply don't draft QBs at all. Not a great strategy to my mind, but it's what they do.
And I think it's unfair to talk about "our inability to scout QBs" when the entire NFL evaluated these guys pretty much the same way--that's why Dak was there for us at the end of the 4th and we missed out on the other guys. Drafting is hard and unpredictable. I don't see any reason to think the Cowboys are worse at evaluating QB prospects than anyone else.