Can someone explain how one foundation (that manages a BILLION dollars) can simply be replaced by a new foundation? Having talked to some lawyers in this space

Can someone explain how one foundation (that manages a BILLION dollars) can simply be replaced by a new foundation? Having talked to some lawyers in this space during the last weeks I have come to understand how much money is involved here in compensation/fees/listing-fees/advisor-compensation/etc. It is insane. So not really surprised any more regarding their internal conflicts for $$$.