No. They are right. When you survey people, most women are happier working for their children rather than their boss. Most women feeling that way doesn't preclude other women feeling differently. Not does it prescribing a definition of happiness for women that want to work for their boss.
If you mean happiness is not the only metric, we're agreed.
> Sacrificing to have a rewarding, independent life without children ... is definitely not an any way inferior to a “happier” one raising kids.
In the way that it makes makes most people less happy, it is.