The "blue collar" description does not fit well though, as most other high-skill, white-collar jobs (lawyers, doctors, accountants, engineers) are similarly repetetive and mundane. Typically, the company hires experts to do the same thing over and over again. You can escape that by going into research position (but even they can get quite mundane and boring, in current publish-or-perish culture) or by changing career fields every couple of years (not really realistic for most people).