Its not that easy. You have to physical go to a office that deal with cash. Its not permitted to be done through the phone, and only a small subset of bank offices deal with cash.

You also don't get the cash immediately, but have to wait a minimum of several bank days. Also, as regulation against money laundry require, you must tell the bank as to the purpose of the withdraw and they are permitted to deny it.

Its much more than just "stop someone who steals your bank card".