Yep, and pretty soon defenses adjust to the black QB constantly running. This also results in them throwing errant passes, which get picked off.
That's why Kapernick's career went into the toilet. Not because of "muh racism."
Kaepernick and Lamar Jackson are one-dimensional running QB's. Patrick Mahomes and Russell Wilson are smart, multi-dimensional QB's who can both run when necessary, and also have powerful, accurate arms.
This isn't a black/white thing. Joe Montana, Steve Young, and John Elway are all HOF QB's who were very dangerous running the ball as well.