Imagine a pincushion.

Stick 50 pins in it. And try to make sure none of them touch.

Now take 5 steps from the pincushion and draw a circle around it, and randomly toss 50 pins into the circle and see how many of them touch.

Now take 500 steps away, create a new virtual circle of that size and toss 50 pins into it in random directions.

Inverse square law applies to physical objects just as much as to radiation. At near orbital distances there’s some risk, and since many objects have decaying orbits there’s more risk over time, but space is really big — even within Earth’s gravity well.