I’ve been quite torn about this all day. Garrett, your comment about intent pushed me further.
Edward Curtis was funded by JP Morgan in 1886-1901. With this funding, he was able to travel, photograph, and extensively do as he felt necessary with the army of people that he needed. The best writeup and hundreds of primary sources are here at the Smithsonian. https://sirismm.si.edu/EADpdfs/NAA.2010-28.pdf
Edward Curtis did ask his subjects to change clothes, make certain poses, and do things they don't normally do. But Why?
JP Morgan is simply massive. They own banks, and investment groups, and control billions of dollars. They settled with the US treasury for almost a billion dollars in fines.https://www.justice.gov/criminal/criminal-vns/case/jpmorgan-chase-co-deferred-prosecution-agreement. They welcome court so much that anyone who wishes to send documents has an easy to find page here including how to reach them in Germany, UK, or any other country where they operate billions of dollars in business: https://privatebank.jpmorgan.com/nam/en/disclosures/legal-disclaimer.
JP Morgan made money from John A Macdonald, The Prime Minister of Canada https://www.jpmorgan.com/CA/en/about-us (Late 19th century milestone) https://www.jpmorganchase.com/about/our-history (owned steel, mining, and railway construction). He was quite interested in getting this railroad built so he can get his country going. Here are his thoughts about Indigenous:
https://www.ictinc.ca/blog/10-quotes-john-a.-macdonald-made-about-first-nations#:~:text=we%20have%20been%20pampering%20and,say%20we%20have%20been%20doing.
"When the school is on the reserve, the child lives with its parents, who are savages, and though he may learn to read and write, his habits and training mode of thought are Indian. He is simply a savage who can read and write." - John A. Macdonald.
Then I found this article that made my life infinitely easier, but also made me want to find more primary sources:
https://www.nationalobserver.com/2020/12/21/opinion/bloody-legacy-canadas-railways-indigenous-peoples
Treaties were signed in 1871-1876 in order for the railway to go through.
The 1880's saw the "pass system" which saw people stuck on the reserve unless they could get a "pass"
Louis Riel was hanged in 1885.
Now you are going to say, Dustin, this is years before Edward started taking pictures. You're right. But WIldfred Laurier announced The Grand Truck Railway https://en.wikipedia.org/wiki/GrandTrunkPacific_Railway in 1905. A railway does not simply be built, and a government does not make knee-jerk reactions. This railway was years in the planning phase.
JP Morgan is a careful businessman. You don't make billions of dollars over a century of business in many countries by being the "lover of all things beautiful" https://www.youtube.com/watch?v=-gWtU7K23Dk (1:47).Here is his museum: https://www.themorgan.org/about/introduction. While it looks like he was a collector, it is as much of a ruse as the music played in the university advertising video we saw at the start. Those collections all built in value. A partial collection of Curtis photographs is now worth 1.44 million (https://www.swanngalleries.com/news/photographs-and-photobooks/2012/10/1-44-million-for-edward-s-curtis-the-north-american-indian/#:~:text=for%20Edward%20S.-,Curtis's%20The%20North%20American%20Indian,house%20for%20works%20on%20paper.).
JP Morgan (and/or his son) knew about the Grand Trunk Railway. He knew because he was one of the few men in Canada who could build it and the insider government workers would undoubtedly have approached him. The government had to plan before being able to announce it. Morgan was reeling from the expensive first railway he build in 1880 and wanted to know what issues he was going to face and how much it was going to cost. So, he hired Edward Curtis, the poor, newlywed, gullible lover of adventure that he was, who could do a bunch of scouting for JP Morgan PLUS provide photographs. These photos shows people living on the land who would have to be bought, moved, or dealt with. When they wear fancier clothes, appear healthier, show no signs of the squaller that Curtis is critisized for not showing, they will be harder to move. JP Morgan would definitley need more government dollars if he had to deal with that. I submit that the setup of these photos no doubt played some role in contract negotiations between Morgan and the government towards the price of the Grand Trunk Railroad.
TL;dr Evil corporation hires a spy to hose a corrupt government out of millions.