What does it say that Michelle Obama - the only Dem with even an outside chance of beating Trump - is the least qualified person?

She hasn't held an elected office. She hasn't built or run anything outside of politics. She never created one job. Sure she is smart but what has she really done to indicate that she is a better candidate than any other Dem being considered or referenced as Biden's replacement?
Aside from the indifference that she exuded while in the White House, why would she even want to give up her rock star lifestyle and money to save Biden or Democrats?