Even that article uses very carefully shot photos as other examples of what modern Indian look like. The photos you look down on weren't fabricated. They weren't given new clothes, or told to do anything different than they normally would. Was it 100% accurate? I doubt it, but then again, nothing ever is. They're certainly better than the alternative, which is to have no photos of them at all... People will learn to appreciate something they can see far more than if they cannot. Doesn't hurt the argument made behind them (wanting to preserve groups of people with dwindling numbers and traditional ways of doing things, for future generations who likely wouldn't be so lucky), if the photographer was white, Indian, or any other race or demographic. Most people don't complain historians are mostly old white dudes...
The rock at Plymouth sucks though. At least according to people who went there. I grew up in MA and somehow never went on a trip there.