I have no problem with SAHM or SAHD, if you can afford to and are happy that way. Brilliant.
However, saying that “he wouldn’t be able to work hard or he’d have to pay someone else to look after the kids and keep the household” is what I have a massive problem with.
Without my husband I managed to move abroad, work full-time, save up to buy a home, take our son to and from nursery, where he did 7 hour days, I studied and planned our wedding.
I didn’t need to pay someone to “keep the household” and my home wasn’t disgusting.
(His income at the time went on paying for all the paperwork for his visa and our wedding, keeping our home in the UK and moving our stuff from the UK to our current country).
Then you say “What I mean is that if you're an actual stay at home mum, then it's usually up to you alone to do the 24 hour shift. Your husband / anyone will not help you. It's your job. When you're working, you should ideally get support from your partner or nanny etc.” and I fundamentally disagree with this stance as well.
If you are a SAHP then this is a sure fire way to burn out AND the working parent is ALSO a parent and someone who lives in the house, so they shouldn’t get away with not helping out when they are off work.
Both to be a good role model to the child, if it’s a boy to show him that men aren’t excluded from housework and childrearing and if it’s a girl to show her that she shouldn’t accept being the only one to clean and take care of the children. But also to show his (hopefully) wife that he loves her and values her. She can stay at home with sick children/wake up in the night but he can do bedtime or whatever, as it’s so important that children also bond with their father as a father and not a “friend”.
Also, you later touch on the money being half yours in case of a split, even if married you’re very unlikely to get half of his income today. As any kind of spousal maintenance is very rare today. You might get a good amount whilst the children are still children.
I think SAHP are heroes, I just personally prioritise being able to pay my way in life. If my husband lost his job tomorrow then we’d be able to survive on my income alone and vice versa.