I believe it, it forces you to vice the trigger to rear rather than squeeze it. If that makes sense.
That wasn’t my issue though, a massive flinch got my I called it as soon as the bullet left the gun.
I see flinching quite a bit. The good news is that flinching can be corrected w/ quality dry fire. If it’s not a recurring issue just move on & don’t dwell on it.
I have students that laugh when I instruct floating the pinky. Some don’t need to practice this method, but those who need it & actually practice it reap the benefits.