I'm not sure how I was specifically talking about crystalized knowledge. People can be flawed in applying any mental skill. And various forms of intelligence come into play in various ways in navigating the nuances or reality, or failing to.
Knowing or not knowing a fact is the simplest to see and talk about, so it probably dominates conversations about intelligence, sure.
Learned that I needed to vacuum the dust off my window AC filter a couple times a year when it stopped cooling very well and I took the front cover off and saw that it had turned into a block of ice.