Bill,
Us guys using side-cutters as strippers is one thing, a DIY-type person doing the same thing with the same tool, is another.
We use the same tools, day in, day out and are used to how these tools work.
The problem with nicked and broken wires, is a wholly understated thing, where you and I would cut the end off the wire and start again (If we did happen to nick a wire strand!), this is often not the case with the DIY person, as in, near enough is good enough.
This line of thinking, burns houses down. [Linked Image]