Broke: DnD bards cast magic by creating music and how well they play affects the strength of the magic
Woke: Bards have no inherent magic and rely on their high charisma to convince people of things, which in time evolved into a social status akin to Discworld witches where people believe whatever they say to the extent that it affects them as if it were real magic
A bard casting high level magic is effectively them telling the universe itself “no see things are actually like this” and the universe BELIEVES THEM