Why are the orbitals of the hydrogen atom described as "probability maps"? why are the edges of the hydrogen orbitals sometimes drawn to appear "fuzzy"?

Orbitals are sometimes called probability maps which means that at any point in the 3D probability map the probability at a point denotes the chances of a electron to be there at a time point. 

Since hydrogen has only on electron, the probability falls equal in a sphere around the nucleus. That's why they are sometimes drawn to appear fuzzy(To show the equal probability).

Where’s the graph 0.0