I've worked in an environment where I've been sitting at a desk using a laptop, but required to wear boots, high-vis, hard-hat, glasses and gloves.
It's more about ass-covering than anything else.
I had the 'pleasure' of working for DuPont in Holland for a year. One of the most safety conscious companies around, 10 years without a lost time accident etc etc. If you were caught on site with a knife of any kind you were banned for life, try carrying a cardboard box without leather gloves on and you were reprimanded, climbing stairs you were required to have at least one hand holding a banister at all times (you had to take a lift if you had one of those deadly cardboard boxes to carry).
To measure a voltage in a control cabinet you had to lock power off, unlock panel door, connect meter, lock door, unlock power and turn it on. You could then observe the voltage reading though the polycarb panels in the control cab doors. Want to measure something else, repeat ad nauseum....
Soldering a D-connector required a bloke with a fire extinguisher standing by, full face mask, leather gloves, overalls.
In the end I ended up taking a van over. inside with the doors shut we did what the f**k we wanted. Grinding, cutting, welding, spilling as much blood and burning as much flesh as we could bear.
At the end of the job I reversed the van at speed into a big sign that said "SAFETY IS NO ACCIDENT". Oh dear, I'm not allowed back there again haha