Blind Pew has it about right. I am sick and tired of the wannabees who seem to know before they start flying what they need and don't need to study. Some of the questions are bizarre, yes, but that's a separate issue from the syllabus. None of us, schools or authorities, know where you are going to end up. Your licence covers you for all types of flying from airline to bush and those two by themselves are entirely different. Sure, you don't need too much detailed knowledge of convergency with an IRS or two in the front, but it's sure handy when you are flying around big open spaces like Alberta! In any case, you are still responsioble for what your IRS gets up to and you need to detect when it's not giving you the correct information, for which you need to know its limitations.
That kind of attitude shows a disrespect for the people who have gone before you and have learnt the hard way that you do need that knowledge.
Good judgement is based on experience. Experience is based on bad judgement.