Isn't another point of ED to learn HOW to dismount and roll? I have heard it's to teach you how to roll into a ball or something, right? I have no experience with it, as I have always felt like the majority of you. However upon close examination of some factors (like falling back/rearing) I have to agree knowing how in extreme situations is probably a good thing, if taught when TO utilize it and when to NOT. I also know part of being a truly good horseman is keeping us both safe, IMO.
"If you talk to the animals they will talk with you and you will know each other. If you do not talk to them you will not know them and what you do not know, you will fear. What one fears, one destroys." - Chief Dan George