Why not everything is free.
The best things in life are never free. If everything were free there would be no use in existing, because there would be no need to work. The struggles we face to get what we want is what truly makes us who we are.
The time, effort, and love we put into a marriage is something that there is absolutely no comparison to. The look of pride on your face when you see your child happy and fulfilled, that's something you work for years even a lifetime to see. The face of you savior looking you in the eye and saying "Well done thou good and faithful servant, enter into the house of the lord" That is something worth every heartbreak and death in this world