I disagreed, then re-read your post, then re-read the OP, and now I've come full circle to apologize; I think you make a fair point.

I work at a biotech. We spent who knows how much time and money trying to develop a 'lab technician bot' to automate one of our critical assays. Turns out, a 6-figure machine still isn't as economical as my coworker Y, one of the veteran lab-technicians. Sure she takes the occasional sick day but even at our volume (and we do industrial-level, multiple clients batched into a single assay pass) it won't be economical to replace her for a very long time (if we even reach that scale).