Why is there anything at all, why not nothing? And is this question connected to the nature of the world we see today, i.e. is this question connected to quantum mechanics and relativity?
Firstly, it has to be reasonably assumed that the world is a self-contained, self-sufficient, standalone thing, and that there is nothing outside of the world.
So, the world necessarily created the very specific, basic mathematical aspects of the world that we see today: the world created categories; the world created mathematical relationships between the categories; the world created numbers; the world assigned some numbers to some of the categories, where this number assignment is also a creative act.
But there is no reason to think that creativity has suddenly disappeared in the world we see today. This is because quantum “number jumps” are the perfect example of creativity: what happens in quantum number jumps is that numbers are assigned to categories.
The distinctive characteristic of quantum number jumps is NOT their embarrassing unpredictability. This unpredictability is embarrassing for the people who claim that the world can be defined with a few equations on the front of a T-shirt. But these people have masked their embarrassment by adopting a very definite-sounding and confident-sounding euphemism: “randomness”.
The distinctive characteristic of quantum “number jumps” is that numbers have been assigned to categories, which is a creative act.