Some posters have said that the washing machine has meant that people now wear clean clothes every day, but still do the same amount of laundry overall - i.e. it's not labour saving but expectation raising.
That doesn't reflect my experience. My (WOHM) grandmother will always notice an unironed shirt. ( Always because my family's clothes are always unironed). Some people maybe do choose to iron their socks, but there is nowehere near the shame attached to not having impecable housekeeping. I recall sitting with my nan in her kitchen - she had two cast iron irons, one on the gas flame warming up and one ironing the clothes, then swap them round when the first cooled down too much. She'd have this little rag to hold onto it so her hand didn't burn.
Similarly with meals, I'll serve a minestrone with a slice of granary bread and a chunk of cheddar as a main weekday meal. My (also WOHM) mother (and presumably generations of women before her) don;t consider they've served a valid meal unless they have soup/meat/ starch/ side vegetable/ side salad/ desert.
And, yes, my mum recalls the boiling napies, the strange vinegar based concoctions, and the way that regardless of how hard she worked and how often she changed me, I had near permanent nappy rash. My mum fell in love with disposables when I had Dd1.
With regards to men taking their share - labour saving machines with buttons and lights are much more male-friendly than the routines and potions and long drawn out complicated processes that came before.
IMO, no question, housework takes up less of my time and defines less of my identity than would have been the case pre-washing machine pre-microwave etc.
With regards to the pill - what came first, improved contraception, or different expectations of women? 'Taking the pill in secret' is referring to a small subset of abused and coerced women. It is more common nowdays to not even be married before your 30s. Presumably, contraception - condom if pill is not available - goes without saying when sex is outside a marriage/marriage like long term cohabitaion.