Doesn't sound all that convincing to me. There is no need for network controlled fridges in the first place. And it's not like setting up that network control was free. This is not about saving money, this is about ignoring what IT people preach since multiple decades now, spending more for the attack vector and then loosing a lot of money when that attack vector gets used. Margins? If it were about margins the problem wouldn't exist.

(I can see the need for remote monitoring, that the freezer actually worked. Controlling the temperature is the issue.)