That isn’t even close to true. Darnold was considered to have great POTENTIAL two years ago. But to be frank, Josh Rosen has the best arm talent out of all these QBs, and ran a Pro style offense for much of his career. Character issues hurt him.
Mayfield plays like Favre but lacks Favre like arm strength.
Darnold has some elusivity and is unafraid of pressure, but he turns the ball over way too much.
Josh Allen has a rocket arm, but he has a bunch of issues with decision making and other problems.
Jackson is inaccurate and under throws deep balls, but is the Barry Sanders of QBs.
Not a single one of these QBs is consensus. The most talented one, I maintain, is Rosen. But he has a grating personality and quarterbacks need to be leaders.
Which brings us back to Mayfield. He is the happy medium between all these guys, and it’s probably why he went number one.