Some women find being confined to household tasks unendurably stifling and boring. My mother was one of these, and she had an unusual attitude to childcare, in that she solved it by leaving me, the youngest, at home by myself when I was 3 1/2.
It would be easy to say "poor me", but I can't recall feeling in any way bad about it. Not lonely, not bored, not afraid: maybe peripheral, at the worst.
As an adult, I was appalled, but she defended it valiantly, pointing out that she was accessible in the school in the photo. Our house was some distance behind the photographer: not far, but it seemed quite a trek to me.
She must have had a lot of confidence in her children.