Fair point. As the responses note, the damage here is usually limited -- ATMs carry only so much cash each, and (usually) only dispense up to a few hundred dollars (or equivalents) at a time. There've been some exceptions where an exploit is found and utilized in mass effect at many locations in a short period. That takes a high level of organization though.
On Feb. 19, cashing crews were in place at A.T.M.'s across Manhattan and in two dozen other countries ... Starting at 3 p.m., the crews made 36,000 transactions and withdrew about $40 million from machines in the various countries in about 10 hours
I stand corrected. That's quite impressive and amazing that they had that many people involved and nobody tipped it off.