Permanency of Marriage

[bearbear]

It's clear Matthew 19:9 is controversial. My question is why do evangelicals base their doctrine of divorce and remarriage based on this controversial verse when there are so many other clear verses which directly forbid divorce and remarriage with no exceptions? Why not use the clear verses to understand the unclear verse and not the other way around?

Luke 16:18
Everyone who divorces his wife and marries another commits adultery, and he who marries a woman divorced from her husband commits adultery

Mark 10:11-12
And he said to them, “Whoever divorces his wife and marries another commits adultery against her, and if she divorces her husband and marries another, she commits adultery.”

1 Cor 7:10-11
To the married I give this charge (not I, but the Lord): the wife should not separate from her husband (but if she does, she should remain unmarried or else be reconciled to her husband), and the husband should not divorce his wife.

Romans 7:2-3
For a married woman is bound by law to her husband while he lives, but if her husband dies she is released from the law of marriage. Accordingly, she will be called an adulteress if she lives with another man while her husband is alive. But if her husband dies, she is free from that law, and if she marries another man she is not an adulteress.

1 Cor 7:39
A wife is bound to her husband as long as he lives. But if her husband dies, she is free to be married to whom she wishes, only in the Lord