it helps speed/reaction time to certain things irl which could be useful. Such as sports, And being able to do little things such as saving something after almost dropping it. It can also help with overrall skill in gaming. in games such as call of duty, you need to be able to react to someone shooting at u or finding someone to shoot at. if you cant do this fast enough you'll end up dying fairly quick. i also find enjoyment in showing off to my friends. And in recent years, osu has gained popularity from the fortnite community for practicing aim.