Except his post isn’t made-up nonsense. My employer doesn’t allow tinkering with work computers either due to regulations around the data being analyzed. Hell, the only way to get software installed is through encrypted package delivery so only software dual-authorized can be pushed to a computer.
You missed the point .
Which was that lack of access to computer internals can be a benefitial design feature - and that is nonsense .
It's like welding the bonnet of a car shut to keep random people from readjusting the valve timing of the engine , as passerby do .