Wu Jen learns spells of level 1-3, but the psi points chart goes to 5th level. Why?

@JeremyECrawford Q: wu jen learns spells of level 1-3, but the psi points chart goes to 5th level. Why?

— Bob Huss (@coyote670) March 14, 2017

See "Casting a Spell at Higher Levels" (PH, 201) for why having higher-level spell slots is never a bad thing. #DnD https://t.co/OqIKRpjfvQ

— Jeremy Crawford (@JeremyECrawford) March 14, 2017