Itmam-e-Hujjah Of Prophet Muhammad (sws)
But in case of prophet sws….abive cases happened….which collectively made it possible for bani ishmael or latest bearers of deen of abraham as to do it as ummah on other people…. Lets reverse if that would not have happened… 1)no tawatur(quli and tahreeri) 2)no preservation of language. Recitation would have lost…so higher possiblities of misinterpretations…. And also if it had been preserved but not language lets say… then as well it would not have been in position to have pure understanding of the Quranic ayahs…. So need if prophet would have been….