Good cherry pick.
You can have your views on it, but with all the stuff flying around in a real game all the practice you did while invincible against a firing range of strafing Anas is still not going to help you.
Pretty much every other game mode outside this little sand box game is going to improve you more.
Been playing shooters a very long time, and even back when I was a novice I doubt this would of helped me.