the prediction and trajectory thats involved in the arrows in incredibly similar to aiming pipes
sure they can headshot but have you SEEN how much direct pipes do?
they do ~100 which is a heck of a lot more than an uncharged bodyshot from an arrow
charging shots as a sniper is just a waste of time
youll find that the snipers that spend the least amount of time charging and much more of their time aiming before they scope, scoping, and then immediately headshotting are the snipers that are the really good ones
the only class you should really ever charge for is a heavy