You are going on different track my dear. Let me explain you differently.
Why a Muslim pray 5 time not, why not 4 or 6 time? Why a Muslim name should be Imran why not Sunil Agrawal? Why a Muslim bend for namaj in perticular direction.
This is all I am talking about. That's a culture and tradition you get from your ancestors and make you unique. Some are faith based, some are country based, some are region based.
But, if somebody is rigid and determine not to understand other's idea then nobody can make him understand.