It helps if you can shoot fast AND accurately. It won't help at all in any sort of competition that I'm aware of if you just shoot as fast as you can without being able to make hits.And it tells you how fast you can really do it if you had to...
which helps in all sorts of firearms competitions...
Excellent analogy. But the key is building skill by a gradual improvement, not simply going as fast as is humanly possible without having built the skill to support the speed. Imagine someone without the ability trying to play a song as fast as they can possibly move their fingers and what a trainwreck that would be if they hadn't started slow, getting use to the feel and working until they were competent and could play well and fast. If they do that frequently, they're probably actually going to learn bad habits and prolong the time it takes them to learn to play competently and fast.This is going to be a screwy analogy, but hey, you work with what you know...
Its kinda like playing Bass guitar...you start slow, getting used to the feel,
the walking fingers, the slap style, and the pick...and you get competent...
until you can play well, and fast...
Same thing goes for shooting. Doing a mag dump just to hear the noise might be fun, but there's no practical benefit to it and it can actually teach bad lessons.