I've posted multiple studies that show there's no difference.
Do you have anything to back up your claim? Anything at all?
There is obviously something lost in the studies that you're providing. Many have pointed out that it isn't necessarily a serious injury that derail "running" quarterbacks but cumulative effect that shortens their window of effectiveness. Let's just define a running QB as a QB who is very dependent on his running ability, and supposing that he couldn't threaten the defense for positive yardage, would not be a starting quarterback. In other words, passing ability (accuracy/decision making) often appears to be better than it really is because the threat of the run creates favorable matchups. That isn't the same as, say, a mobile QB who typically uses scrambling ability to elude a pass rush but is ultimately trying to create space to throw the football...in the vein of Aaron Rodgers, Patrick Mahomes or Russell Wilson (or even Tom Brady could be considered mobile in some ways since his footwork is so great at avoiding pressure.)
Lamar Jackson is very much a running QB. It's self-evident and crazy to dispute that. Supposing his running ability virtually disappeared, could he throw from the line of scrimmage consistently and be a good quarterback? Many doubt that. Again, his passing stats in college are also inflated by the dual threat nature of his abilities.
Regarding the opinion that these scrambling QBs are more susceptible to injury, shorter careers, etc., it just seems so obvious.
The first QB I remember watching who could rack up yardage was Steve Young, though he is one of the few running QBs who was deadly from the pocket as well. But look at the absolutely crazy beating he took over his career with all the concussions. The dude's brain got fried, and there have been many stories about the effects of these injuries; he was so clearly and demonstrably more susceptible to big hits and concussions when tucking the ball and running. This actually happened and isn't some assumption or revisionist history.
Daunte Culpepper was another QB who showed just how much the dual threat can inflate passing stats. After his injury, he went could no longer run through a defense and his pocket play deteriorated. Everyone swore he was a great QB regardless of his ability to run, but that was shown to not be the case.
RGIII??? Another guy who many thought was a gimmicky run-first guy, and it turns out they were right. Sure, he had a devastating injury, but how many classic pocket passers have shredded a knee and then returned to their form? Many of them. RGIII was dependent on his running option style but was not actually a great passer, contrary to the eye test his first season.
Colin Kaepernick set a lot of these records that Lamar Jackson is now breaking, and this was also under Roman. Yet another guy who was suspected of being dependent on his running threat and confirmed to be the case. He gradually lost speed and burst and couldn't overcome that loss. Granted, he was probably still starter quality and got blackballed, but look at the decline from 2012-14 that led to Roman's ultimate firing. Long-term, this stuff doesn't work.
Cam Newton peaked in 2015, despite questions about his accuracy and decision making. He ran the ball very well and almost carried the Panthers to a championship. Seems like a QB in his mid-20s playing at such a high level would not begin falling off a cliff so soon, so why Cam? Is there really any question that his running style has led to frequent injuries, some keeping him on the bench and some just slowing him down and greatly effecting his overall production? He's a clear and obvious example of the rise and fall of a QB with this style not being able to survive the physical pounding of the NFL for as long as traditional pocket passers. And he's a big, strong guy who outlasted many others.
How about Tyrod Taylor? He was looking pretty good for a couple of years in Buffalo. What was it about his game that led people to believe it would be short-lived success? He lost a step and is now a backup, and no one is surprised.
(j/k... sort of... okay, not really)
