Outsourcing is very different to employing remote workers. When you outsource you're essentially giving up a lot of direct control over how work is done, who is doing it, what quality processes are in place, and what the deliverables look like. Companies like to control those things, and will often pay a premium to maintain control over them. Remote work maintains that control.

Part of this is visible because many remote roles are advertised as only being open to people in the same country, or timezone, or even state. Companies want their employees to be able to talk in real time (which is actually a little annoying..)

I don't think there's much similarity between outsourcing and remote work.