Eyewitnesses can easily be confronted and cross examined. Questioning eyewitnesses is a relatively common skill among defense attorneys, and the arguments being made in such cross examinations are easily grasped by jurors.

The algorithm behind something like this might not even be made available to defense counsel. If it is, examination will require an expert witness (which costs $$$$), and it's doubtful that 12 average citizens would be able to assess the validity of or even comprehend the arguments.