The subject is moving at a high rate of speed, even at an incredible shutter speed, if a program compiled 3 layers of one shot in 3 tonal ranges, the subject would have moved, thus piling as one blurry subject.
I don't know how to describe what I mean. I know what an HDR is...I just don't know anything about making them. I just thought even with your 3 shots you could avoid what ever subject is moving when editing (as in so that it's not blurred).