When Billy Batson is gifted the powers of Shazam, the Wizard claims
Yes. I give you the power. And with it all my strength. Solomon's wisdom. The power of Hercules. Atlas toughness. The power of Zeus. The courage of Achilles. And Mercury's speed.
Shazam is shown to have super-strength (Hercules), invulnerability (Atlas), super-speed (Mercury), lightning (Zeus), but limited wisdom or courage.
From the wiki:
Wisdom: Billy has instant access to a vast amount of scholarly knowledge and objective. He possesses an excellent mental acuity and nearly infallible wisdom, including an innate understanding virtually all known languages and sciences.
Courage: This aspect is mostly psychological and spiritual in nature. The courage of Achilles gives the mental fortitude of the legendary Greek hero. This gives him superhuman levels of inner strength, willpower, discipline and resolve from which to draw upon in times of hopelessness, and possibly great fighting skills.
Throughout the movie, he sort of develops courage and has a eureka moment by the end, but it's not on the level as his other powers.
So, why is there this disparity between the physical powers he was given (and obviously has), and his mental powers (which he doesn't seem to have)?