We file taxes jointly, so even though I earn no income as a SAHM the taxes are paid in my name too. My husband earns the income he does, enabling the government to collect $$$ in taxes, because I subsidise him through free childcare and housekeeping. The SS taxes he pays removes money from my own budget as certainly as if the W2 was issued straight to me. You can bet your sweet bippy I won’t consider it something for nothing when I start collecting Social Security, if the damn thing even exists.
What you wrote applies to all married couplles filing jointly and PAY into the system. So there is no difference there - other than TWO are paying and not ONE.
Plenty of woman work when their kids become school age - lots of drama - shifting shedules, etc. but it’s done.
Don’t imply those working outside the home don’t do more work in LESS TIME than those who don’t work outside the home! Been on both sides of the fence, I can’t be conned, I know the deal.