That's why pilots get paid the big bucks (hah!).
The theory says if you don't continue after reaching V1, you'll run off the runway end. But in a lift-killing windshear (head to tail)? You might have trouble reaching VR/V2 and getting off the runway either.
See AeroMéxico Connect Flight 2431. They tried to continue, crashed back to earth, overran the runway end anyway - amazingly with no deaths.