I’m a stay at home dad or at least I was until my son started pre-k a few months ago.
There’s no amount of money that would make me feel comfortable also taking care of someone else’s children in my home. Just not worth the trouble or the risk.
I guess I assume that if you have a rapport with a neighbor, you can trust that they won't be out to screw you if a kid gets hurt, but maybe that's naive. Or maybe my parents were just lax; I remember my grandparents let us ride around on a moped that could do ~35 mph when I was probably under 10, and we'd go wander around in a forest near their house, or me and the neighbor kids would go play in the desert near my house growing up when I was probably ~6. Probably never more than .5-1 miles away, but still pretty much only "supervised" by older kids.
Like a lot of things, informal, regular babysitting got ruined by a few people trying to hustle it into a business. This seems to be happening to everything that can be gig-ified:
1. People once did X informally for friends
2. Someone realized they could charge for X
3. People start doing X over and over for strangers, turning it into a business
4. Some disaster happens because X is now a hazardous unregulated business
5. Finally, the government steps in with heavy handed regulation, and now only licensed businesses are technically allowed do X.
At age 5, I was driving my BMX around Montgomery Co, Alabama with a single shot Remington .410 bungee strapped to the handle bars. I was a latch key kid from the day I started kindergarten. I was cooking for myself and dressing myself starting then as well.
I won't allow my own child to experience any of that.
Of course, the poorer people have no choice and make it work, but I'm certain they get "caught" now and then.