Humanity or Robotics in Space?

Extract

The diagram (Fig. 1) qualitatively exhibits how several important observations will have to be undertaken. Here, I would like to, at least, raise the question or discuss the problem referring to “Man in Space”.

My question is as follows: How the man in space, like the Space Shuttle, and the robotics, like Voyager, precede the man in space “and/or” the robotics in the 21st century? I think, the answer is not obvious and we have to be cautious to make decisions. Once we make the decision, we may not be able to go backwards because the investments will be enormous and the impact to all humans will be very deep.