The best shooters will benefit less from reduced recoil because they're good enough to compensate.
But the less skilled you are as a shooter, the more you'll benefit from switching to a 9mm from something bigger. And that's why the FBI is recommending 9s to LE agencies, who employ people of all shapes and sizes and abilities. And rightfully so. _____________________________________________
But apparently every swinging dick on the campfire is so advanced that they can shoot .40s and .45s and 9s all equally.