Why does Shaolin Wushu have to be what it is now?

When look at other Chinese martial arts styles (ex. Wing Chun, Baguazhang, etc.), the styles seem to incorporate fighting into their curriculum. Why does Northern Shaolin have to be the one to separate forms and San Da? If San Da is for fighting, then what are the forms for? I know that forms are good for conditioning the body so it can stay healthy an everything, but Wing Chun and Baguazang can do that too. Those two styles incorporate fighting into their currciculums. Why can't Shaolin teachers do the same?