I know you are joking but Ishi, The Last of His Tribe, went directly from the Stone Age (the last known hunter and gatherer in California) and learned not only to ride streetcars and attend dinner parties; he worked as a janitor for the rest of his life. He not only learned to cook on the modern stoves (of the early 20th century) but he complained that White People cooked their food too much, especially vegetables.
On seeing one of the "Daring Young Men in their Flying Machines" he pointed up and said "That's a White Person up there isn't it?" and laughed.
He also helped create the modern sport of archery by introducing the young son of his anthropologist friend to hunt properly with a bow and arrow. Though to his dying day, he couldn't hit a standing target and found it rather silly, he was a master at shooting games in real life, but targets he found amusing and frustrating.
I point out that Ishi had help learning the ropes from his anthropologist friend, who also got him a place to live, a job and gradually helped him learn English and the modern world of San Francisco in the early 1900s (which had electricity, phones, and cable cars).
Ishi wasn't just dumped into the modern world with no preparation, but he learned not only to navigate it wonderfully but he had a sense of humor and made observations that an insider probably couldn't have done. He enjoyed a modern lifestyle, but in many ways, he wished for his old one, but sadly he really was the Last of His Tribe.
Anyway, stories like Ishi's are why I am asking why? And I'm not ready to just say "oh these people are savages" because while a few of them may be, most probably are not. There is something else going on here, but I don't know what it is yet.