Even the packed neutrons in a pulsar are not basic material. They, too, are empty and compressible. If the remains of a collapsing star are 3.2 times larger than our sun, the gravity is too strong to be checked at the pulsar level. If planet Earth were squeezed to its Schwarzchild Radius, it would be the size of a pearl. This isn't Captain Marvel comics.
Pulsars are real.
So are black holes, the astrophysicists say. The non-reality of matter is just one of many enigmas that science reveals. When we see the North Star, we are looking back in time to the medieval era, because the light we see began traveling 680 years ago. Every second, the visible universe expands by a volume as large as the Milky Way. Although atoms are generally indestructible, their electrons keep coming loose to produce lightning and the other electricity of the world.