I am an old timer and a late bloomer to this PE game, but in my 20 years of experience, the only ones who dont get their PE are the ones who stop trying.
Man, I did well on the AM...73%, but bombed the PM in 3 categories. Seems like the average of those who passed aced the AM, cuz the PM was brutal. On the AM I missed 1 or 2 and was to the left of average pass. We'll get'em next year. Seems I was close, only needing 6-9 more correct is my guess.
Ive been in this industry for 20 years. My advice is to do the work you enjoy. If you enjoy new things, do that. If you like to specialize in one area, do that. Take money out of the equation.