Everybody in the World has an EDC, even if you live in a nudist colony everybody has stuff they don't leave home without.
I've told this story before but it really was a Benchmark in my life. When I was stationed in Germany I got sent to a M16 qualification off post. I'm pretty sure it was the very first time I had to qualify on Active Duty. To make a long story short when we arrived at the Range (Vilsek?) it was a blizzard and I wasn't prepared. Due to circumstances beyond my control I ended up in the field for five days with no clean underwear/socks, no personal hygiene items, no wet weather gear, no sleeping bag and no smokes. I learned my lesson and I never again left main post without a small pack with the above mentioned items. It came in very handy more than once.
ETA
When I worked as a security guard tbere were certain things I learned from experience, I should have with me for every shift.
I always had a hat and sunglasses even if I was working nights. I always had at least one pen and one notebook on my person. I always had my phone and a charging cable. I always had a Flashlight (usually two and a spare in my work bag) and a charger for it. I always had my Buck 110 and a Multitool. I usually had a smaller folder in my pocket because a Utilities Admin Assistant freaked out one day when I pulled out my Buck to cut open a box for her. Every company I worked for had me AED/CPR certified and I was required to have a barrier device and gloves all the time. I never bothered with a watch because the company phone or the computer on my desk was always the "official" time. I always carried at least a 40 ounce water jug. My last 3 years I carried a bag of Catfood in the trunk of my car.
I always carried a pack with me to work with clean socks, underwear and T-shirt, a rain coat, a complete set of Waffle Tops. Wind proof fleece. Several extra pens and notebooks and phone chargers. Gloves, winter and work. A Bible and whatever book I was currently reading. I also kept an emergency radio that would double as a battery pack in my pack.
When I worked armed I was only allowed to use the gun and ammunition and OC they issued me with
ZERO modifications or alterations. I once had to DX
ONE ROUND of ammunition and write a statement as to why (it got a bunch of oil on it)I was DXing it. They also issued me my duty belt, holster and handcuffs, I was allowed my own magazine carriers and radio holder but they had to match the belt.
Now I'm retired and I carry what I want.
I don't carry sunglasses because the VA bought me photo grays but I have a spare set in my car. I always have my hat I always have a water bottle. I always have my wallet and keys. I still carry my Buck and my Multitool and a smaller knife. I always have the same flashlight I carried at work and OC. I always have a handkerchief. I always carry my phone.
And of course a Glock 19 and two reloads