The thing with a lot of youngsters is they can't, or won't do things the old way, I've seen young lads spend 10 minutes going back to the van to get a cordless drill to put 2 screws in a piece of timber, my god, 2X 1 1/2X8 I'd have had them in with a screwdriver by the time they've gone to the van and back.
Recently I saw a video on YT and this young bloke was fitting a CU, he used an cordless impact screwdriver to tighten all the screws,including the breakers!
I would never use a cordless impact to finally tighten anything in a CU.
However, I do use one to fit the mounting screws, and run the bulk of the threads down if its all I have, I would normally use the non-impact for anything with a machined thread.
The reason being, if I drove 2 off 1 1/2" x No 8 screws in by hand, if I could, then that would be my hand of no use for the next hour whilst I got the feeling back.
To use the "in" term, I have massive WRULD, Work Related Upper Limb Disorder.
My hands are "knackered" to put it politely, the action of gripping and tightening such as is required to drive a wood screw in by hand wrecks me for a good time.
If one understands this concept, then I would never push a youngster into ending up in the same position.
Remember the "mad hatters" that was not a nice place to be either.
I never had patience with people with a "bad back" until I had one, then my outlook on life changed completely!
My mantra these days is that I will not risk myself in any way, or further any of my conditions, just for a customer to make a profit at the risk of my health and wellbeing.
I will ask them is that is what they want, when you put it to them that way, it is surprising how many customers don't really want people hurting themselves on their sites, the paperwork is a nightmare...