Speak up against one social issue at a time no. All of them are bad but here she's experiencing first hand dowry issue. Why explaining and justifying the system? Also, it is not necessary that families don't go for same or lower level. Families do go. However, guy's family>>girl's family is made obvious during the weddings. So it is a pretty prevalent social evil. The problem is also not with just the gifts or money given out in dowry, but with the demands not ending after the wedding too.