Society tries to teach us that intellectual pursuits will necessarily make you smarter - that "building your brain" around facts and problem solving tactics is the way to improve your understanding.
That's so wrong, it's a special kind of stupid.
Emotional capacity, not intellectual content, is the carrier wave of intelligence; emotional response is the method by which that carrier is modulated to encode intellectual content. Without the emotional carrier and modulation, intellectual content is indistinguishable from background noise or static.
That's why emotional events can be so disruptive to clear thinking, and why activities both intellectual and athletic that allow one to reach a flow state simultaneously makes one feel "in the groove".