I feel the Chewey incident is very regrettable. Each safety system has to be consistent in its rules. The way I was taught and practice, there is no possibility that that could happen. There is no excuse for ever having any part of your body within 6" of any moving part of a lathe or mill. On my 7.5 HP lathe, getting caught like that would mean a quick death.
I've seen Joe Pie and others use a file right handed, reaching over the chuck. I would have been instantly fired if I ever was seen doing that. (And I never would - using a file left handed is a necessary lathe skill IMO)
Yet Chewy, Joe pie an others are very skilled, and each has their own rules. The problems begin if you add inconsistent allowables or restrictions. Then you find yourself compromising to get the work done. That's when you get hurt. I have considerable respect for other ways of doing things, as long as safety is preserved.