Bunch of items missing in here.
'Really the calculus is quite simple: If you should be wearing a helmet, you probably should be wearing a pro-vest (which kind, at that point, might be a more cogent discussion).
The comment about generators struck a chord, though. I've spent thirty years in the design & construction industry (until our glorious Economy took that all away with Mr Peabody's coal train). One of my pet peeves is with people/organizations which buy a gen set and then never maintain it. They are always surprised when things go south and you can't just push the "easy" button.
That under-clothing pro-vest, or that "flak jacket"/plate carrier in the closet is like an unused genny. It's probably not stored right. It's probably not adjusted right either (human body dimensions cycle daily, weekly, monthly as is, add in age-related metabolic changes). But, as with all other disaster/business recovery plans, if you are not testing the plan out, if you are not exercising the system, it's like a genny with no POL. And, as potentially as dangerous--that "dryer cord" genset hook up is becoming every more illegal, from the risk of energizing downed power lines.
"But, it's so hard; it's too complicated--no body can do that Brother Bluto!" Heard this a time or two. Have to take a deep breath and explain, once again, about how I used to trundle about the ocean in big gray metal boxes. That, when they had a "fire drill" I was expected to be able to go from sound asleep to having my steel-toe boonies on, gloves, flash hood, OBA, and a red helmet on; to then check my berthing area before beating feet to the REP 3 rally point ready to take the muster from the LPO. And, it was preferred that this happen really fast. And 100% of the time. Including socks rolled over trousers and all. And heaven help you if the XO thought any were slacking off.
Humans are capable of some miraculous and marvelous things; quite a few of those requiring some concerted practice. Ok, what I used to do in 90-100 seconds might take 4-5 minutes now--but, I also know where my boonies are and that they fit, too.
It's not merely have-and-not-need; it's have-and-can-use. Do they have battery back-ups for the computers where you work? Have they tested them? Are the internet routers protected too? Tested that? 80% of the time the answer is no.
Dang it, I'm going to go check my fire extinguishers now . . .