Why are our water and power utilities connected to the internet? Is it so that the employees controlling them can work from home? If so they are accepting too much risk relative to the benefit.
think about a grid responding to demand. The old model (like the titanic) had a remote manager phoning the site lead who phoned the control room who phoned the engineering room.
Remote management has clear benefits, don’t be obtuse. I totally agree on the security risks, but the benefits are obvious.
It makes sense to have them connected for a lot of reasons.
Sounds like a good application of mesh networks.