Easy check, grab a voltmeter and do it yourself.
Pull the plug, set voltmeter to AC, and read the voltage across the prongs. If you get anything over the usual float voltage you get from just holding the probes ungrounded, then you have a problem.
Redundancies and failsafes are always a best practice in engineering work. This is no different.
I mean, yeah? You give anything a connection to a global network with billions of people, and there will always be a chance for it to be exploited. Hell, even my personal OpenVPN instance for remotely accessing my home servers has to fend off attacks.
This is why my next vehicle will be a slate truck. Zero internet connectivity by default, and updates can be done via USB-C from a phone (which can be vetted as needed).
Sounds like an improvement to me.