What happens when a human being tries to create a random sequence of ones and zeroes (on and off, yes or no)?
Similarly, what if you wanted to randomly place objects around a room? Would they all be equally spaced? No, because if it’s truly random, each object isn’t thinking about the objects that are already there and trying to find its own spot.
In reality, random distribution of objects will also include (random) clustering. If a person tries to distribute objects on a two-dimensional plane and make them seem random, the lack of clustering is a clue that it was a person trying to be random rather than truly random.