I used to work with various ATMs and the cash dispenser _is_ a hardened safe, with a combination lock and all. If you are to steal an ATM, you will still need to open the safe and the simplest option would indeed be to try and persuade it to just dispense the money.

The thing is that ATMs from larger vendors (IBM, NCR, Bull, Siemens, etc.) have layer upon layers of protection features. For example, you can configure a secondary combination for the safe which will open it and also send an emergency alert. This is for the cases when someone is being forced to open the safe at gunpoint. There are batteries for secondary power supply. There are options for physical lock-down in case of a power loss. Tilt and movement sensors. Redundant communication options, including exotics like x.28 radio.

I mean that all of this was readily available even 20 years ago. ATMs are not designed by amateurs. The issue is that all these are _options_. They need to be bought first and then they also need to be properly configured and enabled, which falls on the banks or their IT service providers to do. The smaller the bank, the less willing they are to spend even more money on configuring secondary stuff and setting up an infrastructure for it, so many of these options will remain off even if they are available.