The end game is to create a fully fungible digital cash
I think you're mistaking "fungibility" for "obscurity". They are not the same thing.
Fungibility doesn't come at the expense of transparency (unless you're talking about fungibility of 'transaction IDs'
)oh boy, here you are again with your inane theories about money...
in bitcoin, fungibility is broken because of transaction history, in xmr, fungibility works because of no transaction history aka what you call obscurity...
it's just that simple...