There are a number of occupations that, despite how important they are to society, receive little to no respect. While some people might be willing to do undesirable work out of necessity or personal gain, others are so prideful that they will refuse to do work that they think of as beneath them. Said reasons might be out of genuine pride or an excuse for laziness, but regardless of the reasons, these people will often refuse to do work that's "beneath them" unless forced by circumstances, and sometimes not even then, with the most extreme examples essentially choosing to live in poverty or even die rather than work a job which they feel isn't good enough for them.