I imagine there has been such an investigation. But first, you have to decide what was "the decision" that caused the accident. In aviation they say that an incident is none things going wrong at once, an accident is ten. If five people each believe that one of the other four had put the safety locks in place, and none had, which of the five made the decision which caused the accident?
The company was certainly liable, and has been fined. The question is, was any person liable, to the extent that the could be imprisoned for manslaughter?
The problem being, apparently, that nobody made "the decision". Due to lack of communication, one crew thought that status was A, and the other that it was B. Should you sent to prison the person who allowed live power in an area he thought there was nobody working, or the person who sent people to work where he thought the power was off? Or the bosses in the two different companies involved? Or the bosses in the employing company, a bank, the only place the chains of command met, who though they were employing competent contractors? The problem is that the structures were so confused that, though they didn't realise it, there was no-one in control. Finding someone guilty "beyond reasonable doubt" is almost certainly impossible.
But to know to turn it off, you have to know it is on. And that appears to be the problem here - people didn't know what was on.
Reading the article, it appears that it is not that "somebody made the call", it is that communications between the teams working on the project, from two companies, was so bad that one crew didn't realist that people would be working in the area, and the other crew didn't realise it was live. Incompetence, not risk-taking.
Also, if one have to drive all around town to buy a car, one must live in a pretty desolate area. I generally go to one place and see Honda, Toyota, Kia, etc. Then I go to another place and see Mercedes, Volvo, Lotus.
Honestly, if we were all willing to payer the suggested retail price for cars, as Tesla wants us to, then dealers would not be necessary. But as the art of the deal for the automobile is ingrained in the current US culture, we have dealers.
No, to eliminate most healthcare, you have to eliminate ageing. Cancer is not a hunger related disease, nor is Alzheimers. Only somewhat cardiac. It is alleged that 50% of health spending is in the last six months of life. Hunger is a major problem, and hunger has health consequences. But it is not the major driver for healthcare demand.
Nonetheless, you need to get file access to such devices to read the passwords. The trick here was that they managed to get the kettle to, effectively, spit out the WiFi password. Until you compromise the network, lots of things may have lots of files inside them, but without physical access you can do nothing. This allowed them to compromise the network without physical access.
The problem was this is expensive. In particular you generally have one or more very expensive persons who main duty it is to keep up the computers, which was not normally a full time job, except if computers started failing in bulk, when there was enough people to get it fixed quickly.
Back then there was no standard solution. I recall when the first compaq adaptive load balancer was installed. It seemed a competitive advantage could be gained with the right combination of hardware and custom software. Now there does not appear to be any advantage at small scales. These types of servers are routine and we know what works and doesn't. There is no reason to run hardware when software or sales is the business. Even, for the most part, people used canned software unless their business is software.
This is a desperate argument from someone who does not understand logic. Look up fallacy.
"You can't get very far in this world without your dossier being there first." -- Arthur Miller