Because of the atarah?
1) because of the atarah
2) because there would be right, left, forward, up directions s well
3) because there would be Aya yais after every word.
4) because there would be "high" Aya yais and "low" Aya yais.
5) because v'yaseim would have a drawn out ayaaaaaiiiiii yyyyyyyaaaaaaaaiiiiiiiiiii
Is that enough?