Earlier quoted context omitted.
They made it illegal to be a single mom and not provide adequate childcare. Many families have both parents working, so the situation of needing to find someone to look after your child is not unique to single parents. That said, this is one of the reasons raising children on your own is more difficult.
As a 9 year old (admittedly not in the US), when there was a day without school but my parents still had to work, I was allowed to stay home on my own and ride my bicycle to a town 5km away to buy lunch. My 7 year old brother wasn't allowed to stay home, but came on similar trips with me. The adequate childcare for a responsible 9 year old might be "tell them to call 911 if there's a serious emergency, or text you if…
I was perfectly capable of cooking and looking after things. I just don't get this hysteria that seems to have gripped so many people. We are living in one of the safest times to be alive.