i do not understand the discussion...
why the hell not set the brake?
-when it will not fully release the same may also happen after initial release at the ramp and you would deal with the same problem.
-when the crew manages to mess up with forgetting to release at take off ... well, when its to hard to see the brake light, hear the config warning and feel that the aircraft is still on the brake than they are much more things to mess up at take off...
-the danger in concentrating on charts etc without parking brake and not realizing that the aircraft starts to move is much more given than a failure of the brake system of ignoring all aspects of point two i wrote.
i would say i real life you can do it for an easier life , the rest is pure theoretical what might happen...