The story that photograph is from is about distance learning enforced by the COVID pandemic. https://navajotimes.com/edu/hill-becomes-makeshift-classroom.... The family does not have internet access, and while they were issued a laptop and mobile hotspot, it only gets signal from the top of that hill.
OP may have misunderstood the context but I think it's a stretch to say they were intentionally fooled.
What I meant was they fooled themselves. They had negative assumptions about how Native Americans live and are treated, then they see a photo of a dirt pit, and even though it is completely implausible, assume it is a school. It is so far off reality it is notable.
OP may have misunderstood the context but I think it's a stretch to say they were intentionally fooled.