BP points out that most women are in marriages/relationships with average men and this proves that they are attracted to them.

While this is true, there are varying levels of attraction. You can be "Strongly" attracted to a man and you can be "Minimally" attracted to a man. Most women are only slightly attracted to their man sexually, but the Man’s Job/Status and her circumstances which might force her to settle down makes him a reasonable choice for an LTR.

This “Minimal” attraction fades away overtime and the couple end up having a DB, Affair or divorce.

If the attraction was “Strong” in the first place, the failure rate for marriages wouldn’t be so high.

Women hamster their "Minimal" attraction as "Strong" when they want to settle down.