I think these posts address some of the more precise and rigorous areas on the curriculum and its true that you have to do the work in prep for them (spend time on them!). I find them very interesting as well for the most part.
But I would submit that where most folks hemorhage points at exam time is on the “qualitative” judgment stuff - the behavioural finance, ethics, aspects of GIPS, corporate governance , economics, and especially around interpretation of the various return requirement and tax and portfolio management fact patterns that are not hard in concept but challenging in the heat of the exam