Hypercube point picking - unsolved?

Question

MathWorld says that picking a random point in a unit $n$-cube is an unsolved problem. Why? Isn't it enough to pick $n$ random numbers uniformly distributed in $[0, 1]$?

Answer 1

It doesn't say anything like that. It says that there is no known closed-form expression for the expected distance from a random point to a particular vertex of an $n$-cube.