You are biased. That's not how Paul taught that...
1 Cor 7:10-16
10 And unto the married I command, yet not I, but the Lord, Let not the wife depart from her husband:
11 But and if she depart, let her remain unmarried, or be reconciled to her husband: and let not the husband put away his wife.
Notice Paul taught against... the idea of the man putting away his wife (for whatever other reason than adultery which means sexual intercourse outside the marriage. Jesus confirmed that in Matt.5:32; the Apostles in Acts 15:20).
12 But to the rest speak I, not the Lord: If any brother hath a wife that believeth not, and she be pleased to dwell with him, let him not put her away.
Paul shows in the above case it is the woman's choice to stay or go.
13 And the woman which hath an husband that believeth not, and if he be pleased to dwell with her, let her not leave him.
14 For the unbelieving husband is sanctified by the wife, and the unbelieving wife is sanctified by the husband: else were your children unclean; but now are they holy.
15 But if the unbelieving depart, let him depart. A brother or a sister is not under bondage in such cases: but God hath called us to peace.
16 For what knowest thou, O wife, whether thou shalt save thy husband? or how knowest thou, O man, whether thou shalt save thy wife?
KJV
Same thing for the man who does not believe. Paul applied that to BOTH situations of either the unbelieving husband or unbelieving wife. He was not biased toward the man.
I was stationed in the military in Spain, which is a Catholic by law type nation. You are born by law a Catholic there and must adhere to the policies of the Catholic Church. And the Catholic Church only allows divorce between husband and wife in the specific cases The Bible allows (which is death of one spouse, or one spouse caught in adultery). So when one spouse doesn't abide in Christ, (or maybe never intended to), they simply leave and go off somewhere to live their own life outside the marriage, committing adultery, but not allowed to divorce their spouse nor marry again. And believe it or not, making divorce difficult actually tied Spanish families closer together, made them work harder as a family. So the family atmosphere when I was there was very, very strong.
1 Cor 7:39
39 The wife is bound by the law as long as her husband liveth; but if her husband be dead, she is at liberty to be married to whom she will; only in the Lord.
KJV