I’d argue it’s more intense
You've said that a lot and I understand that the feelings one has for one's children are incredibly intense, but what's intense about the regular day to day cleaning, feeding, nurturing etc?
Do you feel at a high pitch of emotion all day? Are you actively rearing your children minute by minute?
If you were working on a supermarket checkout, say, you couldn't just suddenly say you needed a break because things were a bit overwhelming and go and do something else.
If you're looking after your children, you can. You might cut an outing short or make something a bit more simple for the evening meal but no one would criticise or sack you.
Looking after children can be bloody boring, frustrating, sometimes difficult and there's no immediate end to it, but that's like all jobs.
And the benefit is that you're not doing it because of demanding customers or pupils (and their parents) or patients or an obnoxious boss... you're doing it for people you love. Who, when they stop being a pain, won't cut off your income because you've had an off day.
It’s the implication that he doesn’t do them because he works and therefore the mother doesn’t,
Well, I see that as he works at one job and the SAHM works at another.
But why does it still upset you now? If your husband's not saying the arrangement doesn't work for him then crack on and don't worry about what other people are doing.
If you're convinced you're doing the right thing, don't feel guilty. But also appreciate others might feel differently.