I remember reading a feminist opinion piece that economic dependency should be equivalent to abuse, and thus should be treated in similar way we handle drug abuse or alcohol abuse. A adult with their health intact should support themselves, and choosing not to do so will put the person at higher risk for unbalanced relationships, lower self-esteem, and increase gender inequality.
There are many more women who choose to forego their own education or career advancement to stay at home to raise a family, and without the income of their husband would be destitute. If their husband becomes abusive, for example, they can be quite literally trapped in the relationship because they have no other means of supporting themselves or their children.
In contrast, the women in the article seem to be perfectly capable of leaving whenever they choose. Many of them have excellent education and career experience, and many of them also come from wealthy families who could help them. In the event of divorce, many of them would undoubtedly collect sizable settlements from prenups and possibly alimony.
There's nothing wrong with the choice that they've made, but it remains a choice.