My dad had done national service. It taught him to clean, sew, and carry out many other household duties. He and my mum had a fairly equal partnership - they both cooked, cleaned and cared for me and my brother. I thought all men behaved like this and was completely befuddled when subsequent boyfriends thought I would do all the housework into infinity.
But my entrenched beliefs didn't overrule their entrenched beliefs. I thought we should equally care for the house, they thought it was my job. I could not make them see how unfair this was - because they only knew what they grew up with. Their mum did it all, why could I not?
I was born in 1960 and am hoping that these beliefs are dying out now. I know my sons are equal in the home (one is a carer for his wife so he has to) and I hold out hopes that the 'women does it all' will gradully disappear.
ETA; The boyfriends whose mothers 'did it all' had SAHMs. They couldn't adjust to seeing that when women were out at work, as they were, things couldn't be the same.