I can't speak for OP, but I certainly don't place value on earning above all else.
I think retiring from work is a specific achievement; that a working life for a mother requires significant sacrifice which makes the term retired meaningful in that context. I and many other working mums feel very keenly the pointless hours on the commute while the kids are in wraparound care, laundry packed into early mornings and late night, channeling the energy for meaningful and quality time with the kids when you're just exhausted from work.
The sacrifice a SAHM mum makes is significant too- sacrifice of the ability to amass a financial safety net or own pension, sacrifice of 'self' to some degree in that personal achievement is often associated with her role in the family, sacrifice of respect by those who only respect employed workers (and for that, are morons). But 'retired' is not a meaningful term in describing the end of being a full-time parent, because of course, you never do "retire" from it, and the role adjusts in stages anyway, so there is no significant difference between the day of "retirement" and the day before it.
I guess there is something in the fact that you give up a lot to be a working parent (especially in an economy where many might make a different choice if they were able to), so to hear people who didn't have to give up the same things use a term meaningful to your situation, not theirs, feels a bit like them having their cake and eating it too.
The above paragraph is speculation; I personally love my job (despite the family sacrifices) and feel very lucky to have both the family of my dreams and a job I derive meaning and satisfaction from, and I'm hopefully quite far from retirement so it's fairly abstract.