My first (not frying chicken) job - communications engineer at an aluminium smelter taught me that industrial automation systems can impact health and safety. You might think during an outage "it's fine, they can switch to the manual method", but that puts an operator out on the plant floor for longer. More heat, more stress, more chance for an incident. This job taught me more about system reliability that any of my software focused companies since.
When I worked in the electrical industry it taught me that the work I do has an impact on health and safety. A substation loses comms, a field tech has to drive several hours and hundreds of kilometers at night to restore. It might mean that traffic lights are out, hospitals on emergency power. A comms outage might mean cell services stop.