Re: High value targets
The way I see it, there are two obstacles to machines taking over every job at this time: dexterity and Uncanny Valley.
Some jobs require not just fine motor control but also simultaneous adaptability (such as a position where no two jobs are the same). The first problem is being worked on steadily with more articulate mechanics, but the second one goes to machine learning and will be more difficult to apply in a generic form.
And then there's the natural human instinctual desire to see a friendly face (we have pretty strong evidence this is instinct since the behavior is shown even in newborns). If a job requires (or even just highly recommends) a face-to-face interaction, then it'll naturally prefer a human in it to provide that face.