People will study for interviews as long as interview performance has significant impact on your salary, no matter the field and no matter the interview. When

People will study for interviews as long as interview performance has significant impact on your salary, no matter the field and no matter the interview. When people say that other engineers don't study for their interviews what they are actually saying is that other engineers can't get a better job than they currently have no matter how hard they work. If they could get a better job by showing that they are great at their job in an interview they would study to be able to show that side and get that salary increase. Instead the interviews are just formalities and you get hired and your salary is based on your resume.