Who Were the Sea Peoples?

Working my way back through my notes on Cowen's book, I see he does have this passage acknowledging the importance of service jobs in the future: "As workers are displaced by smart machines and manufacturing and other areas, more individuals will be employed as personal trainers, valets, private tutors, drivers, babysitters, interior designers, carpenters, and other forms of direct personal services." (p. 32) I have worked on an assembly line, and I have worked in a few of the jobs in the list above. In general, the personal service jobs are a lot better. (Having a boss who is a real jerk can change that any quality, however.) I'm not sure why people bemoan this shift.