The importance of inside shot for perimeter players depends on your tactics. If you play inside tactics then inside shot is important for all players. If you play outside tactics then inside shot is still helpful, but not as important as most shots will be jump shots.
Inside shot is more useful for C and PF as they are in the paint more often.
If a perimeter players has high driving, then they should have inside shot being high as well so that they can drive and score.