I've never understood the Venezuala argument about Bitcoin. When someone is buying Bitcoin with a volatile currency (like the Bolivar), it means someone else no

I've never understood the Venezuala argument about Bitcoin. When someone is buying Bitcoin with a volatile currency (like the Bolivar), it means someone else now has that volatile currency. The volatile currency doesn't suddenly dissappear and take it's problems with it. How is this different from buying dollars or euros with the volatile currency. Am I missing something?