A USD pegged asset on any other chain is NOT BitUSD and it should not be marketed as BitUSD. BitUSD only exists on the BitSharesX (soon to be Bitshares) chain. Please read through the thread I linked to in my first comment.
I agree this is an issue. A built in transfer mechanism with a one way peg is a solution to help expand the userbase of BitAssets on the Bitshares chain.