Right, but the lunar science was not just limited to sample return, and here the J missions (Apollo 15-17) with their SIM bay cameras produced much better image quality than even Lunar Orbiter for much of the Moon's surface (Lunar Orbiter 5, in the polar orbit, was able to map parts of the Moon that the J missions never saw.) Similarly, the rover's traveled farther than the Lunkhod's did, showing us a much greater area of the surface. And the most sophisticated scientific instrument ever to go to the moon, even today, would be Harrison Schmitt, with his Harvard Geology Ph.D brain and hands.

As for "done with 1960's technology" so was Apollo: the ability to discover hydrogen (used to find the ice in the lunar crater shadows) wasn't possible with 1960's sensors that were light enough even for the much larger mass and power budgets of an Apollo spacecraft (vis a vis Lunar Orbiter or similar probe).

Coincidentally last night I re-watched one of my favorite episodes of "From the Earth to the Moon," "Galileo was Right," which focuses on the Apollo 15 crews getting field training in geology. Their instructor (along with backup LM pilot Jack Schmitt, a geologist, who then flew on Apollo 17) emphasized identifying and collecting the "right" rocks, not just "any" rocks, which led to some of the more interesting samples, including the "Genesis Rock."