Yes and we are all aware of that. Are you saying that his experience and blog cause harm to those people who have to do it?
There's been countless posts about Amazon warehouse conditions on Hackernews and other news sources.
The takeaway is more that one of the contributing reasons the world is so dystopian is that people at the top literally have no awareness or understanding or what life is like at the bottom.
"Harm"? Not really. But this guy is not much different from a millionaire pretending to be homeless and bumming quarters at the train station. Might he find it an interesting experience? Sure. But it's fundamentally just a form of "class vacation" as rich people often do.