The War on Terror Financing(tm) made KYC-less transfers using formal banking systems well nigh impossible. Your transaction was covered by past KYC (by your financial institution).

Right, so you think.

But: your bank knows who you are and the recipient's bank knows who they are. Your transfer may have been below the increased attention threshold ($10K to $50K depending on the jurisdictions of both recipients).

Both your accounts are most likely not recent and in good standing.

And so on. I routinely make international wiretransfers as well but I'm under no illusion whatsoever that if I tried to cross an anti-money-laundering or anti-terrorism-financing threshold somewhere that the transfer would be immediately stopped and an investigation would ensue.