Slavery:
100% was an employment agreement. Ex 21:16 “Anyone who kidnaps someone is to be put to death, whether the victim has been sold or is still in the kidnapper’s possession.
Yes. They could buy and sell people. They couldn't just take people. The people had to be willing. And, Lv 25 is loaded with rules. Try to stay in context if you want to be taken seriously. That system was the corporate system of the day. And, everyone, not just slaves, could catch a physical beating for doing wrong.
Prov.26:3 A whip for the horse, a bridle for the donkey, and a rod for the backs of fools!
There was no slight toward slaves. That was for everyone.
Actually, the Bible specifically states that there is neutral value between men and women.
Gal 3:28 There is neither Jew nor Gentile, neither slave nor free, nor is there male and female, for you are all one in Christ Jesus.
Your assumptions about value are, at best, own. More than likely, it's just a parroting from someone else. None of that was actual uncleanliness. So, why don't you ask why there was any ceremonial uncleanliness at all? By inserting your fanciful reasoning, you show that you are more interested in creating a false narrative than you are in the truth. Ceremonial uncleanliness was all about teaching the Jews, in baby steps, lessons about God's goodness in spite of man's sin. The redemptive power of Christ was demonstrated in the entire system. There was a price to be paid but, a man child would be born and cut that cost. It's not about the value of the male or female. It's about the value of the work of God and the plan He had in action. If you are confused about the Scriptures, look for Jesus and, you'll start to get centered.