“The big picture” is that these supernovae take place in galaxies with regular frequency, that is clear.. AND also that certain stars can expand into red giants and destroy the inner planets, before a supernova explodes ‘nearby’
Of immediate concern to us is this one particular star, the Sun. When the Sun reaches the red giant phase, the Earth will be destroyed THEREBY alone not by the supernova (if the supernova explosion had not taken place by then.) This is what I meant.
Destruction will take place one way or another,that is the ‘big picture’