I think my question was clear enough. The comment didn’t mention banks, I’ve never had a bank that did that, and we generally don’t try to hide our identities from our banks anyway. My best guess was that they misunderstood how public/private keys work, but since that was only a guess, I asked.
While we’re at it, let’s ban languages that aren’t understood by Europol employees. Criminals could be using them to have private conversations.