For me this isn't rocket science...I hear a bang, I haven't rotated yet, I see 5000 ft (or much less)of runway ahead, I stop...big deal.
The salient points are, unlike just about any other manouevre, that there is very little margin for error with and RTO. Any delay or mistake will likely end in an overrun. If you have time to think between V1 and Vr then you probably don't have enough runway. So it isn't rocket science, unless you are absolutely certain that the aircraft won't fly, the lesser risk is to accept an overrun and the relatively small number of deaths and serious injuries that result. It is a stark choice!