Earlier quoted context omitted.
Why don't we see what he says? In https://www.thespacereview.com/article/1037/1 you'll find that he is very critical of manned spaceflight in general, but about Apollo he says, "No, at the time of Apollo, the astronauts did do some useful things. They brought back Lunar samples. They placed a laser reflector on the Moon that has been used ever since to monitor the motion of the Moon with incredible accuracy." Earlier…
He is critical of manned space flight and says plainly in a number of his talks, recalling from the top of my head, “man spaceflight has costed such and such billions of dollars and has produced nothing of scientific value” or “this was sold to public as a scientific project but it’s nothing of the sort”, and that “it’s all done on earth.” He mentions one area, but then says, “but actually that could have been done m…
Those were useful things that could have been done by unmanned rockets, but in those days, the state of the art in computers and robotics was not what it is now.
The whole "the state of the art" bit I understand as saying that with modern computers and robotics, unmanned vehicles could have done the job. But they didn't have advanced enough computers and robotics at the time.