It is getting "help" by the driveout. Or the driveout is getting help from CF. They help each other.
Driveout is providing the motion, which you claim is generating CF, which you then claim "helps" Driveout??? Sounds like the basis for a perpetual motion machine!
Throwout is preempted by Driveout. If CF were present in releasing #3, then the left arm would be the delivery mechanism, forcing #4 to be a PA in Hitting. But per 12-1-0, Hitting is Triple Barrel(1/2/3) not 4-barrel(1/2/3/4).