PRESUME THAT EVERYBODY KNOWS THE LAW
The aims of section 498A were to help wife to stay with her husband, protecting wives from marital harassment, abuse, and extortionist dowry demands.
Read the section;https://www.vakilno1.com/bareacts/indianpenalcode/s498a.htm
But husband and their relatives violate the law,therefore wife filed 498a in order to protect from harassment but there are some women who misuse the law i.e,498a .
So, Two aspect ; First Husband/their relatives violate the law.Demand for dowry.
Second,Wife misuse the law. Demand for money,extortion,etc.
Third because of one and two ,true women suffer ,dont get justice.
Marriage: profit for women, loss for men
Thus, total loss for true wife/husband.
As to the other statement of this maxim, to presume a fact is to accept it as proved and act upon it as if it were a, fact, SO THAT TO PRESUME THAT EVERYBODY KNOWS THE LAW IS TO ACCEPT AS TRUE WHAT IS KNOWN TO BE UNTRUE. That is going beyond all reason, and naturally A GREAT DEAL BEYOND ANYTHING IN THE EVIDENCE ACT. The PRINCIPLE of which those two versions of the maxim are, like most maxims, MUCH TOO WIDE A STATEMENT IS THAT IT IS EVERY MAN'S BUSINESS TO KNOW THE LAW AND TO KEEP INSIDE IT, AND IF HE BREAKS IT BECAUSE HE HAS NOT TAKEN THE TROUBLE TO DO SO, HE IS AS MUCH LIABLE TO PUNISHMENT, though usually not liable to as much punishment, as if he had.
An article posted by Narendra Sharma;https://www.lawyersclubindia.com/blog/show_post.asp?blog_posts_id=1454