I haven't read the intervening comments since U was posting this morning. But when I said not everyone has it in them to be a SAHM (or SAHD) - well, they don't.
Being with kids (often multiple kids) as default day in day out is not something everybody can cope with. It can be overwhelming, exhausting; you can lose your sense of self if you're not very careful. Some people find it boring, others find they just aren't cut out for it. So, what I'm saying is, if you are a SAHM and this is something you want to do, you have to be sure you are cut out for it. If you "don't understand the point" of what you are doing then, fgs, don't do it because it could affect your mental health and that's no good for the kids.
I have friends who openly admit they don't have it in them to be a SAHM. They say they need structure in their day. They need a job title or they feel all over the place and anxious. They don't have the patience to be with their kids all the time. They say they can't think of how to get through the day without losing the plot.
They are not worse parents. Do what you need to do. But they are happier parents working, so that benefits their kids. I, on the other hand, would be utterly miserable if I'd had to use childcare. Well, I just would not have done that, unless I was a single parent and had no choice. That doesn't make me a better parent. It just is what it is and I feel how I feel, so that's the end of that.