when you work for a company then you should abide by the rules and regulations. if not then you will be punished according to the books.

when you believe in a religion then you should abide by the books whether the book is Quran or Bible.

so it is not a matter of following what the priest or mulla says, it is what is written in the books. you cannot be selctive and apply what you like (same thing like when you work for a company) you abide by all and you cannot be selective