Are the comments different, though? "Permissionless composability" - basically blockchain jargon for financial transactions that have no oversight - are made possible by the things runeks mentions. It's like someone saying "this solves the double spending problem," and someone else going "no, this allows me to buy contraband."
It's not exactly a surprise that crypto allows transactions without oversight. The issue is whether or not that's something actually useful, and for the vast majority of people it clearly isn't.
It is a surprise, since all accounts and transactions are teansparent to all.
And if you say that it was "obvious" that working mixers would exist, we are going to have to disagree. (Also I am willing to bet that if you put a significant amount of computing power into it, you can untangle that ball of yarn, and the US intelligence agencies did, like for Tor.)
It's not exactly a surprise that crypto allows transactions without oversight. The issue is whether or not that's something actually useful, and for the vast majority of people it clearly isn't.