Earlier quoted context omitted.
Apple may not own the factories (why the fuck would they, they're not a manufacturing company) but they do what they can to ensure children don't work in the factories that build their products. They've stopped doing business with the contractors that were using child labor. This story is the moral equivalent of turning "Apple fires employee for kicking co-worker in crotch" to "Apple caught kicking employees in crotc…
Indeed, they shouldn't own the factory. If they owned the factory their bottom line might be affected. People might start asking uncomfortable questions about the pay of those employees. The current arrangement allows they to say, "We didn't hire these kids, it's not our fault. Why the fuck would we own the factory? "
There are lots of perfectly non-cynical reasons to outsource manufacturing--or for that matter, anything your business itself isn't exceptionally good at.