Check out his initial draft profile in 2017 on the NFL web site. It's very telling.
https://www.nfl.com/prospects/patric...1-bb89191b4e71
They list a ton of strengths, and then look at the first six items on the list of weaknesses:
Can be inconsistent in his approach
Needs to play inside the offense and show more discipline
Too eager to go big game hunting
Ravenous appetite for the explosive play can also bring unwanted trouble
Willingness to default to playground style appears to limit his ability to get into a consistent rhythm
Needs to improve anticipatory reads and learn to take what the defense gives him
Every one of these is a strength if you're an open-minded coach/GM. But too many were locked into a box of what a quarterback should be, and that's how you end up with game manager quarterbacks. There's no doubt that a bunch of teams didn't see the talent because the talent wasn't cookie-cutter.