It's because your intuition is on a human scales. White dwarfs apparently have a density near 1 tonne/cubic centimeter and consist of plasma which only runs an

It's because your intuition is on a human scales. White dwarfs apparently have a density near 1 tonne/cubic centimeter and consist of plasma which only runs analogous to fluids so far before the analogy breaks down. One difference is that plasma will have mobile charge carriers likely imparting something similar to a London dispersion force if there's any charge directionality in the super nova blast wave. What likely has the most impact though is the density and gravity that holds the object together in a way fluid droplets on earth do not.