What you say looks true, but that is not what theyr taught me as high power electronic engineer...
The point is that AC gives you a chance to escape 50 times a seconde (bounce, flee, react). the danger with DC is you get stuck forever...
Maybe is it a wrong point, it is just what they taught me, and they had experience.
(the kind of guy who pour water every day on their earth pole to remember about safety)
What they taught me in my EE circuits class and lab, was that when working around high voltage (AC or DC), always keep your left hand in your pocket, and NEVER, EVER under ANY CIRCUMSTANCE take it out. It was, and is, good advice.
The lab had thick rubber insulating mats. It is virtually impossible to get electrocuted in a lab like this if you work single handedly (preferably with your right hand, for reasons stated above). Grabbing a 1000VAC wire with one hand will have no effect.
Tesla had a lot of fun entertaining people with high voltage stunts like this (but please don't try this at home, folks).
But seriously, 50VDC is essentially harmless, while 100VAC can definitely stop your heart. Permanently.