I strongly suspect this effect is correlated with a weakness in short-term or working memory. Independent of general intelligence is the necessity for those with a weak short-term or working memory to compensate by relying on long-term, in depth understanding in order to JIT the necessary short-term structures into being on the spot, (often repeatedly as these images decay rapidly) in order to solve a problem. Wherea…
But I also abhor rote memorization. Not because I don't think it's valuable, I just hate extremely repetitive tasks. Close friends of mine with zero interest in the subject just took everything at face level and preferred to rote memorize everything and slap it down as needed. And they tested much better than I did. Neither I or they are more intelligent than one another and these days we all excel at our own areas we enjoy. But for that subject in particular, in a rushed classroom standardized testing situation, I think their approach was "better".