Most of that is correct and good, but most of that is also culpable of
onlyism in one form or another. For example, Jesus explained the reason Moses permitted divorce, implying it was acceptable for Moses to do so, but then Jesus explained it wasn't that way in the beginning and he then qualified allowable divorce with an "except." The "except" being
sexual immorality (Mt. 5:32 & 19:9). Notice this sexually immoral (ex-)wife is not said to be adulterous
unless or until she remarries 
. Remember Jesus' words were couched in the Tanakh, especially those of the Pentateuch's Law. The Law treated any pair of men and women who'd had sex as married. The law required them to marry -
but only if they are discovered!!!
Deuteronomy 22:28-29
If a man finds a girl who is a virgin, who is not engaged, and seizes her and lies with her and they are discovered, then the man who lay with her shall give to the girl's father fifty shekels of silver, and she shall become his wife because he has violated her; he cannot divorce her all his days.
Of course, if she's not a virgin when they are discovered then they can go their separate ways, and everyone is going to have to be okay with it all

. That is, unless, of course, they're applying Exodus over Deuteronomy because...
Exodus 22:16-17
If a man seduces a virgin who is not engaged, and lies with her, he must pay a dowry for her to be his wife. If her father absolutely refuses to give her to him, he shall pay money equal to the dowry for virgins.
In which case all he has to do is pay a dowry and even then marriage is not required if dad's not okay with the guy. Premarital sex is okay if you do not get caught or pay dad for having sex with his daughter and you're good to go; the standards of the Law have been met. Unless, of course, one of them is a sorcerer, they included an animal, or made a sacrifice to another god. Then one or both of them have to die.
Good thing the cross did away with all that. Now we can pay to sleep with all the dads' daughter and commit adultery because all those sins can be forgiven.
Romans 6:1
What shall we say then? Are we to continue in sin so that grace may increase?




The point is this: treating God's word legalistically makes a mockery of it.
The principle upon which all those commands were built is simple: purity. In modern vernacular: keep your pants. You're not going to win a modern civil suit demanding someone pay you for having sex with your daughter (or you paying some other dad because your son violated the Mosaic Law).
Legalism kills.