That "fact" is false, and sets up a straw man in the place of the views and preferences of people who know what they're talking about.

In what sense is traveling with modern equipment, vaccinated and raised in an industrial society,

while under the protection of American law and mores, so that they don't have to band together in tribes for pretection, compete with other tribes for land, and do the whole tribal bickering and conformity thing

all of which depends crucially on a vast technological economy and society, 'living in harmony with nature'?

They aren't living in harmony with nature because their brief highly sanitized encounters are structured and make use of countless highly unnatural products & tools, and so that is not a strawman.