Why would I care about the "achievement" of getting the job more than the quality of the job (pay, benefits, subject matter, learning opportunities, commute, et

Why would I care about the "achievement" of getting the job more than the quality of the job (pay, benefits, subject matter, learning opportunities, commute, etc.)? If the interview was complex because the job is complex then the benefits should be appropriate. If the interview was complex and the job was simple then the interview was stupid.