I think the biggest contributor to this maybe the fact that no one else has done it even until today. No one is even close to doing it again. 40 years later wit

I think the biggest contributor to this maybe the fact that no one else has done it even until today. No one is even close to doing it again. 40 years later with technology leaps and bounds better than back when it was done. Or maybe it is technology that is holding us back. The idea that not everything is perfect and we can't run a mission till everything is.