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[MCU] Aether extraction question (Endgame spoilers)

A major plot point of Thor: The Dark World is that the Aether is trapped in Natalie Portman, slowly killing her. Asgardian scientists and healers are shown to be unable to remove the substance safely. When Rocket and Thor arrive from 2023 they have a Wii remote sized device that can extract the Aether (presumably) without killing her and then store it. Is this implying that Rocket has an understanding of science and/or infinity stone magic that exceeds that of the Asgardians from a decade prior? Given how relatively powerful Asgard is supposed to be in this universe that seems unlikely.

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Also did Steve stick the Aether back in her afterwards? How exactly did that go down?
gpt
In all likelihood, Rocket collaborated on his Aether-gun with Tony and Bruce. Both learned a lot about the Infinity Stones from reading Dr. Selvig's notes on the Tesseract and HYDRA's files on Loki's scepter. Plus, the Stones primarily consist of gamma radiation, which Bruce Banner knows better than anyone in the universe. There's no Asgardian that's shown the depth of knowledge about the Stones that Bruce has. By comparison, the Asgardians have proven quite ignorant about the Infinity Stones. Thor was unable to recognize Loki's scepters contained the Mind Stone for three years, Hela failed to realize the Space Stone could teleport her and her army off Asgard without the Heimdall's Bifrost key, and no one on Asgard even knew the Time Stone was being used on Midgard during the thousands of years Agamotto's successors had it. It's quite possible that for all their knowledge, they remained largely ignorant of the nature of the Infinity Stones, which might be why they outsourced Gauntlet-making to the dwarves of Nidavellir.