But "financial independence" only works in the early part of your life when you are well and fit and single. It is sort of made up when you think about marriage and children and raising a family. When people start to do this, they become financially INTER-dependent, and so the balance of work in the partnership is renegotiated, so financially remunerated and unpaid work both play a part in the overall balance.
If the "high earning man comes along" at the time the man and woman both think of starting a family, then one person entirely, or both partially, must shift their energies in the partnership to cover child care and home making as well as paid work.
Yes, we do often see women doing 90% or more of the unpaid work while the man carries on with 90% or more of his energy into the paid work.
You don't see this as often the other way round, because women more often take time out of work full or part time to take care of children. The reasons are of course physical - but also personal, emotional, societal. Systemic injustice plays a part, where some men don't want to drop back in their career, or have women out earning them, so they refuse to play a equal part in childcare which traps women at home through exhaustion and an ethical responsibility to the children. They are not socially judged or shamed for this. Another systemic injustice is the pay gap which means there are simply fewer massively highly paid women around to be a great catch for the lucky guy who just wants to be a lovely home maker.
I think you're looking at this from the outside with some naivety and simply seeing in your view a load of women stopping working or aspiring to stopping working. You don't see what's under the hood.
Another interesting part of human nature is that when something happens to you which drains some of your power and autonomy, there's a big desire to save face and try and look OK. So you might get women whose actual life is a bit of a gilded cage financially-, or men who are missing out on emotional richness with their family because they have thr burden of work all the time.
To make themselves feel better maybe they show off, present their life as aspirational and say they have it good?