Our common sense is constructed and based on the scales of things (whether it's sizes, weights or spans of time) we experience in our immediate surroundings. It's based on spans of time of a fraction of a second to a few decades, and sizes from as small as a grain of sand to the size of a mountain. We struggle to fathom things that don't fit between those limits such as the workings of cells, the much smaller interactions between proteins, and even much much smaller when you get to atoms and subatomic particles. Same goes for the Interactions between the absolutely huge things like stars, black holes and galaxies, which they themselves are minute in comparison to the scale of the universe.

Reality is far more absurd than we're capable of registering, being able to learn of it but not truly understand it, constantly going back to the simple little perception we have where everything just goes on with structure we can make sense of.