I would be really helpful if you were specific about what you mean by 'earlier generations'. If you mean people born in the 1880s I agree with you. If you mean people born in the 1960s then I probably disagree.
Our mothers who had kids in 70s worked - both my DGM both worked - kids 40 and 50s - and one Great Grandmother worked though necessity which would have been early 1900s.
My DGP - and MIL parents only had two kids - though choice so must have had some access to contraceptives in 40s and 50s.
Dmum was let go in 70s for being pg - they though they were being nice letting her stay working after marriage - and in previous years they assumed marriage was a resignation.
Previous generations of DH and my family did fair bit of moving round the globe and the UK and Ireland.
I've had posters assert none of the above could possibly be true. MN history is like a young child concept of histroy an amorphous blob of before times.
We are the beneficiaries of a lot of pervious generations of women making the world much fairer for us and that does mean leaving marraiges now is eaiser than in lot of the past - not a bad thing at all.
However I think there's now a almost infantilizing of young adults - and thus a negativity attached to more adult things like settling down and well as economic barriers to doing it at ages young adults did in the past.
I've seen demogrpahers talk of this social shift saying marriage itself and parenhood as well is now a cap stone event - something done after everything else the final thing where as till relavtively recently it was a thing you did alongside rest of life. There are always people who do things different though - so doesn't surpsie me some couples meet young and still stay together happily for life.