Why can't the poles see the aurora at the same time during the vernal equinox and the autumnal equinox?

Aurora is formed by solar storm particles captured by the earth's magnetic field entering the earth's atmosphere and colliding with the atmosphere to emit light. To see the aurora, two conditions must be met: one is that it can only be seen at high latitudes, and the other is that it must be seen at night.

When there is an extreme night in the North Pole, it must be an extreme day in the South Pole. There is an extreme day in the North Pole, and there must be an extreme night in the South Pole, so the North and South poles cannot be at night at the same time, so they cannot see the aurora at the same time.