I think there is a big piece of the puzzel that NASA did for like say elon. He didnt have to start at zero. And now NASA has created the safety and materials and overcome problems. I think if humans don't go out into the universe it will be a great limitation to our species. Sure we will need robotics and ai but part of the whole thing is to expand and go where no man has gone before. To lay human eyes on other planets. We might be able to identify life that so could never understand because we are alive. Imo