After V1 you only abort if running of the end at low speed during abort is better than failing to fly at high speed. As we can never put every conceivable failure in the checklist there will alway be the discussion afterwards if it was the right decision. If Sully had hit the geese between V1 and Vr, and overrun into the water aborting it would be the right decision, because you can’t fly with both engines failed. If you think the speed brakes are stuck in the up position it might be the right decision, I wasn’t there.....