Georgesgran
You are probably right Norah but it’s a different World now. There were very few Nurseries (in my day) that would take babies, so children had to be 3 before they could start LA nursery and then either mornings or afternoons, never both where I lived. Nowadays, there’s pressure on Mums to get back to work, after (usually) a period of unpaid maternity leave. Most families now need both incomes, even after paying substantial Nursery fees - I know my DDs do and DD1 earned more than her husband.
I assume you're correct for you and yours.
I've long contended people can do without extras that 2 incomes provide, one&half incomes, at best, after nursery fees, tax, commute costs).
Rather one could work 2 shifts, nights, weekends or they could be on alternate shifts (thus no childcare).
Debate I won't win, but I find "different world" not a compelling reason for both parents working, yet some do find the logic reasonable.
Personal preferences.