Why are two woman witnesses, equivalent to only one male witness in Islam ?

Re: Why are two woman witnesses, equivalent to only one male witness in Islam ?

It is Quran that says ' if you want to follow Allah, follow the Prophet(SAW).

'He then said: I enjoin you to fear Allah, and to hear and obey even if it be an Abyssinian slave, for those of you who live after me will see great disagreement. You must then follow my sunnah and that of the rightly-guided caliphs. Hold to it and stick fast to it.'

Muslims do need Scholars(people who know about Islam more than a common muslim like me).