Because there were only five centurions in the Roman army, weren’t there? There were six in the second Test between India and Pakistan. Younis Khan was the latest.
High-scoring draws are what India v Pakistan’s all about. Fear of losing led to some classic exhibitions of stone-walling in series gone by.
This is why cricket’s not about batting. Scoring more than the opposition isn’t actually the way to win, despite being a crucial element.