Isn't it just the first behind-the-scenes look at food production for most of us? A rat scurrying by on camera just looks worse than what frequently goes on in the storage room of your or my local food market.
As far as the "beta testing on strangers" aspect, I'd point you to sneak's comment[1], which sums up the slight absurdity of requiring one food to be rigorously tested and adhere to some hypothetical standard. I frequently eat MetRx "meal replacement bars"[2] and I don't assume they are held to any rigorous trials. After some cursory research, I don't even know if Plumpy'nut[3] is held to any standard, aside from beta testing it on starving children and seeing if they improve.
[1] https://news.ycombinator.com/item?id=6722836