That's a good question .but just like we purchase a valuble object say a presure cooker. There are instructions that go with the cooker . We bought into the fact that we want what it's about. Not reading and finding out what you are buying can be a problem down the road. Yet all marriages are not perfect as written here you can see why.
1Co 7:28 But even if you did marry, you would commit no sin. And if a virgin married, such a person would commit no sin.
However, those who do will have tribulation in their flesh. But I am trying to spare you.
Did you notice ' tribulation in the flesh' yes this is true two different people joined togather will have tribulation in the flesh.
But is that a reason to seperate under the law of God who created this bond.
Notice how he feels.
Mt 19:9I say to you that whoever divorces his wife, except on the grounds of sexual immorality, and marries another commits adultery.”
Mt 5:32 However, I say to YOU that everyone divorcing his wife, except on account of fornication, makes her a subject for adultery, and whoever marries a divorced woman commits adultery.
1Co 7:11but if she should actually depart, let her remain unmarried or else make up again with her husband; and a husband should not leave his wife.
These are the laws written yet people ignore them .
The problem with this is The Heavenly Father does not change people do !
We are not to be fooled to think this is not valid.