Because lets assume its possible to survive going into/through a black hole, we would have no way to communicate what happened to the person going into it.
Which it most like would be.
Radio signals travel at light speed. Light speed on the scale of space is incredibly slow.
So assuming that going into a black hole popped you up somewhere else. You would never be able to communicate from where you came from.
The gravity in a black hole is so strong that it can rip apart mile thick rocks. Even if we devise some sort of way to survive that, who says we'll ever come out alive?