Scammers have been doing that with cash, PayPal, gift cards and even regular bank transfers that are supposedly so safe.
Crypto transactions being irreversible are no different than cash or gold transactions, you can't magically revert giving someone cash once you realize they scammed you. Only thing you can do is report it to the police. Crypto works the same way, but for transparent coins like btc, or eth you at least have a proof that a transaction took place unlike cash.