Isn't it already divided? School doesn't teach you how to wash dishes or ride a bike or light a fire. Your parents are unlikely to teach you geometry. I didn't mean to say that an overlap is a bad thing, rather that societies provide many ways of learning, and school can't teach you everything.

If you don't know how to do something it's not necessarily school's fault, and the solution isn't necessarily "more school"

I'm not saying it's not; I'm asking whether the relatively arbitrary line as it is currently drawn makes sense, and how hard we should all be wringing our hands about schools not preparing our children for the real world slash intruding on traditional family tasks or whatever.