But grandparents get old and die, and some live far, far away. And sometimes, there are no sisters or girlfriends, only brothers (but not boyfriends), so the children only have uncles, and the uncles have to be out at work to provide for their own families. And sometimes, the church is very small, so not many aunties, but the ones there are really old, and it's hard enough for them to breathe by themselves than help with children... :-(
I don't think this is usually caused by mothers thinking they can do it all on their own. Often, I think it actually is that there is no outside help. Or the potential outside help is so bad, it's better to go it alone. Like, the outside help would teach the children bad tricks, or hurt the children in some way, etc. People aren't like what they used to be...