Here's something that seems weird to me about babysitting/day care: the kids get attention paid directly, exclusively to them all the time. That's not how it works at home (mine, anyway). At home I spend as much time as possible picking up, cleaning up, cooking, doing laundry, and whatever else I can to keep this place operational as long as the kids are operational without my direct involvement. They usually kind of follow me around while I do these things and find things of their own to do in the same vicinity (I wear the baby or park her where I'm working). Eventually I get tired enough and/or they whine enough that I will sit down and read books to them for a while (I almost never "play"--I am a grownup, and they can knock down blocks without my help). Then I feed them something and we go back to our semi-interactive businesses for a while. This cycle repeats throughout the day.
A child care arrangement is designed solely around keeping children occupied/entertained. No adult there has to make supper or straighten the bedrooms or keep up with laundry. While I am very aware that it is my job to care for my children and teach them what they need to know, this does not mean that I spend every minute of our shared day crawling around on the floor and providing them with structured activities. My caring for them includes providing an acceptably livable house and decent meals, and that means they don't have my undivided attention all the time. I am always with them, but I am not always singularly engaged with them. I have more jobs here than just child care--thank goodness, because I (like many women and nearly all men) would go completely insane if talking to babies was all the day held for me.
The babies are not a Crock Pot, but they are definitely not a wok. They're more like a double boiler.