I think the disagreement here is around different uses of the word "difficult". Engineering is a job that demands more skill. It is difficult in that fewer peop

I think the disagreement here is around different uses of the word "difficult". Engineering is a job that demands more skill. It is difficult in that fewer people are capable of doing it. QA, and to a much greater extend the other jobs you listed, are difficult because they are unpleasant to do. That is, because people are unwilling to do them. (QA still has skill demands that limit the people who are able to do it, just much less so. I dont mean to equate it with the other jobs you listed that are largely just physically demanding and otherwise limited by tolerance for misery). Both are accurate uses of the word, but are very different. I agree with you that QA is more difficult.im the latter sense.