Consider this.
Malachi 2:16 NKJV
“For the Lord God of Israel says
That He hates divorce,
For it covers one’s garment with violence,”
Says the Lord of hosts.
“Therefore take heed to your spirit,
That you do not deal treacherously.”
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And yet, God let Moses write certificates of divorce. And Jesus said divorce on grounds of adultery is permitted.
Look, you are able to run this discussion into a great many pages as you argue hypotheticals,insert other excerpted scriptures,in order to insist your OP premise stands.
It doesn't.
It can't,ever.
Because all it takes to vacate your opinion is one statement from Christ wherein He states Adultery,sex,fornication,outside of the marriage, is the one exception to the overall prohibition against divorce.
And He did state that.
Jesus doesn't need to reiterate the statement in every passage wherein divorce is discussed for that grounds for divorce to remain enforced. He stated it was so,adultery allows for a divorce from the marriage contract.
The two become one. Yet when another one and another one enter into a marriage bed,or any bed with a spouse, the covenant of one is violated. Because one of those two people,or even both, left the other spouse to know another who is not their spouse.
Adultery is grounds for divorce. The only exception.
Word salads arguing how that can't be true doesn't make Jesus' word change from the fact,it is.
Have a blessed and peaceful day.