>>3840144
Weapons require weapon training and the physical ability to swing them or pull the trigger. In order for someone to learn to use a crossbow there are only two character pre requisites, that they have a minimum level of intelligence and they have the body parts necessary to load and fire.
There's no reason a crossbow mercenary or bar-room brawler can't be a mildly dumb goon. I think there is something interesting to the system you propose but it also limits characters by a lot. I dont think being high STR makes you dumb either, in fact all modern science points to the opposite.

Unless of course the point of the system is to play caricatures of fantasy classes, then disregard.