Aside from the points that beevai made, there are substantial differences between the theories here. Wu's theory is not just that ball lightning is a plasma bub

Aside from the points that beevai made, there are substantial differences between the theories here. Wu's theory is not just that ball lightning is a plasma bubble, but that it is a plasma bubble which holds inside of it a very strong standing wave of microwave radiation. It is this radiation which is the main energy driver of the phenomenon and is also the main explanation for how it can pass through objects.