My son loves crankbaits. But if they're not working, he's ready to go within the first 45 minutes or so. I'm still trying to pull something new out of the bag - worm, jig, spinnerbait, yum craw, something. Now, he's not so interested in fishing unless the conditions favor his crankbait skills. Honestly, they fit his temperament best anyway, because he hate to fish slow. Boring to him.
So, if I tried to get him to leave the cranks at home and fish with a T-rig and worm all day, he may never go back. Sometimes, temperament and skills are everything.