YANBU to be concerned about this. There are things about the tired old narrative which really should have changed long before 2026: women are not having it all if they have children and a career any more than men are having it all. No-one suggests men shouldn't have children and maintain a career, do they? The nuclear family is an anomaly. Women have worked outside the home for centuries, millennia even and children have been raised in extended families. In many countries and cultures, this remains the norm - grandparents look after the small children whilst both parents work. My grandmothers worked; my mother worked once we were at school as did my friends' mothers.
The suggestion that a good mother "sacrifices" her career to her children is really insidious - it places an extremely heavy burden on the children and implicitly sends the message that they should similarly limit their own options going forward, if they are girls who want to have children. And actually, I think there is something very powerful in modelling to a growing daughter that she can have a full and independent life outside the home and be financially independent, and in modelling to growing sons that these things are and should be equally accessible to young women as to young men, if those young women want them. And as another PP has noted: financially providing for your family is also an important part of being a parent; in many cases, both parents need to work to ensure that a family is financially secure. Also, circumstances can change such that the husbands/fathers can no longer provide financially and the effects can be particularly difficult if the wife/mother has no earning power.
For me, the bottom line is that SAHMs and WOHMs (Working Outside the Home Mothers) bring different but equally valuable things to the table. There are women who love being SAHMs even as the children get older; they are amazing homemakers and take sufficient pleasure and fulfilment from this; they don't see it as a sacrifice and don't portray limiting messages to their daughters that staying at home is what a good mother does. There are women, like me, who are much better as WOHMs than SAHMs; I'm not a homemaker. My DDs are the most important people to me on the planet and I am a mother throughout the working day. However, I value the satisfaction and fulfilment that having a career and being financially independent give me and I value demonstrating this to my daughters. I also value contributing financially to our family. My DH supported this. The husbands and fathers need to step up; fortunately, I am seeing that happen a lot.
Also, a lot depends on what is being modelled by those at senior management in a business. I am nearly 60 and have recently moved jobs but for nearly 30 years I worked in an internal law firm which grew and grew over the years. In the last 10-15 years, there have been increasing numbers of female partners, including female partners with children and who worked part-time; there have been male partners who have worked part-time for childcare reasons. Young male lawyers have taken shared parental leave. I have seen male lawyers, including male partners, discuss meeting times with clients explaining that they are not available at a certain time because they are dropping off or collecting children from school or attending a school play etc. Clients have only ever responded positively to that.
So yes, it is a real shame if women are again retreating from careers on the basis of pernicious and misogynistic narratives without sufficiently questioning whether it is right for them.