Whether star people came to assist improve a given society is open to question but sounds good. Please recall that The white man came to improve cultures all over the globe this past five centuries and i see little sign that anyone speaks of been grateful. So even if it were true it seems unlikely it would be remembered well.
We have similarly scant indication of a thousand year interweaving of European and Indian cultures in the Mississippi valley as well that ran firmly from 2400 BC through 1159 BC. Again very little sign of gratitude.
Less yet we see scant sign of technology transfer or maintenance afterward. Traditional lifeways are truly complete in their own way and unless we see a complete change out of tool kit usually to agriculture there is little transferable.
Recall that the San and the Abos could go back tomorrow to their traditional lifeway and take nothing from us at all. and soon wear out anything kept.
“This means that these ancient Mesopotamian astronomers had not only figured out how to predict Jupiter’s paths more than 1,000 years before the first telescopes existed, but they were using mathematical techniques that would form the foundations of modern calculus as we now know it.”
“This would open up new ways of computing motion they could have applied to other planets, other parts of Jupiter’s motion..We don’t have examples of that…We only have these four tablets and they all deal with Jupiter – and they all deal with the same segment of 60 days. That’s quite strange.” (source)
New Scientist points out that Scholars at Oxford’s Merton College and in Paris during the 14th century are “typically credited with the same insight about velocity and displacement. They even connected it to the trapezoid shape. These ideas were the antecedents of the calculus developed by Newton and Leibniz – but the Babylonians had them far earlier.”
"My people tell of Star People who came to us many generations ago. The Star people brought spiritual teachings and stories and maps of the cosmos and they offered these freely. They were kind, loving, and set a great example. When they left us, my people say there was a loneliness like no other." – Richard Wagamese, Ojibway Author (source)