Very true.They are finding more and more documentation that supports multiple migrations across the Pacific and trade across the Pacific at much later dates than "conventional wisdom" says happened.
Conventional wisdom also says that Native Americans did not have the wheel, when there is in fact a great deal of pre-Colombian archaeological evidence of wheels. They were not in widespread use, and the theories for this are wide ranging, but they were not unfamiliar with wheels. One of the preferred ideas is that pre-Colombian America did not have any draft animals that made the wheel a practical innovation.
It is largely believed by modern researchers that the main reason why the wheel, large scale domestication of animals, and larger empires had not yet taken hold of the Americas is not because they were inferior people slower to develop, but because they had to overcome many geological and biological barriers that is in a greater presence of the Americas then was present of Eurasia. The Americas did not have as many animals that were good candidates for domestication as Eurasia, and most of the highest calorie agricultural foods started in central America, meaning the food had to spread north and across mountains, which takes generations for the plants to adapt.
This lack of available calories and beast of burden meant slower development of cultures who must put more time into basic survival rather than building a more complex society with enough calories to support non food producing members of society like artisans and bureaucrats.