Maybe you don’t understand what the league has done with qbs. Here are the official rules
In covering the passer position, Referees will be particularly alert to fouls in which defenders impermissibly use the helmet and/or facemask to hit the passer, or use hands, arms, or other parts of the body to hit the passer
forcibly in the head or neck area (see also the other unnecessary roughness rules covering these subjects).
When the passer goes outside the pocket area and either continues moving with the ball (without attempting to advance the ball as a runner) or throws while on the run, he loses the protection of the one-step rule provided for in (a) above, and the protection against a low hit provided for in (e) above, but he remains covered by all the other special protections afforded to a passer in the pocket (b, c, d, and f), as well as the regular unnecessary roughness rules applicable to all player positions. If the passer stops behind the line and clearly establishes a passing posture, he will then be covered by all of the special protections for passers
- When in doubt about a roughness call or potentially dangerous tactic against the quarterback, the Referee should always call roughing the passer.