It is a matter of:
(a) dual systems - some people may need for some work reason to have an Internet connection, but that deos predicate that everything be Internet connected,
(b) and the Internt should not be rhe means for ANY remote communication with any unmanned equipment. Remote communications should use non-Internet, non-telecom-backbone means of remote communication.
Yes, it will require they spend more money and hire more people, and if they do it would not mean any repairs would get done any slower. A little extra cost for a lot more security.
Tell that to the number crunchers in Accounting and see what answers You get. Please let Me know what they tell you, I’ll bet I’ve heard all the optional answers but just incase somebody comes up with a new one...