Let's not forget that these airline cartels continue to overbook flights, leaving people stranded regularly, even during good weather.
We the people could push for laws preventing overbooking or providing better redress for missed transportation. However expect availability to decrease and prices to increase in response.
0. https://www.southwest.com/help/changes-and-cancellations/ove...
If the weather changes such that the maximum weight is reduced, or the plane needs to be replaced and only a smaller plane is available (Southwest flies three 737 variants, one which has quite a few less seats), or a seat is broken and can't be fixed without a greater disruption, they don't really have another option than bumping passengers or always leaving many seats unsold.