Being a professional means having the self confidence and emotional maturity to justify one's work whenever it is called into question. In fact, one should do t

Being a professional means having the self confidence and emotional maturity to justify one's work whenever it is called into question. In fact, one should do the due diligence (including cost benefit analysis) to be able to answer the question with ease. If you can't answer "why are you working on this?" easily then you're not doing your job. And if you resent being asked the question, then you either are self employed or you forgot who pays your salary.