because unlike shitcoins such as ethereum, we here in bitcoin believe that it should remain decentralized and immutable and fungible.
rolling back because someone used bitcoin (or any other altcoin or platform like ethereum) the way they are supposed to be used is against all that above.
this may be a harsh thing to hear, an i have lost coins to exchange scams myself but getting scammed is our own fault, there should never be a way to "bail us out" every time someone scams.
I completely agree, and it is not even about ethics anymore: even in Ethereum community there is currently a discussion ongoing on if such bail outs are even legal! So whoever is engaged in that scheme, he/she may find himself in a middle of a massive lawsuit.