Voxibecause better positioning in fights is often more important than the pistol dmg.
People underestimate how strong the pistol actually is. Contrary to popular belief the pistol is extremely easy to use on anything except other scouts. The scout secondary is a pick-your-poison scenario for other classes. For Scouts, it is a preference thing - I'm almost certain that in NA the majority of scouts use the default pistol, whereas in EU it feels like the Winger is more popular.
In my opinion the problem with the scout class stems from other things: it is the Medic-Scout-Speed and the issue that six bullets in the scattergun clip are extremely forgiving, especially because the reload speed is also incredibly high and that scouts dont sacrifice ammo for mobility, like soldiers do. I'm all up for banning Winger if the other stuff gets banned aswell, but unless changes happen to either the clip size or the reload speed of the scattergun, Scout will still remain the strongest class in the game.