Afaik that claim to fame originally came from the fact how it's really difficult to track down the real owner of a wallet.

With traditional bank accounts there's usually a whole circus of verifying your real identity involved that's directly tied to the account.

While getting a BC wallet involves none of that, heck, it can probably be automated to such a degree that asking the question "Who actually owns the wallet created by a bot?" could become an interesting legal conundrum.