...or you may hit a dog crossing the runway whilst still slowly accelerating towards 155 knots VR when, on the shorter runway you would have been airborne ages ago with a VR of 129 and TOGA thrust.
..or your tire may fail catastrophically at those higher speeds on the longer runway.
..or you might inadvertently cross an active runway whilst taking a detour to the longer runway.
..or that careless buss driver slams into your right wing whilst taking said detour.
It is almost a philosophical question, no clear cut answers
