The Feb 2017 WT is being reviewed here because of the "neither inspired nor infallible" potential of the GB.
This indeed has been stated in the past.
An equally interesting phrase in that paragraph is: "Of course, Jesus did not tell us that his faithful slave would produce perfect spiritual food."
Again, WT is using the "Jesus never said" line.
What would make more sense is: "Jesus never said that the food would be imperfect or harmless."
And, Feb 15, 1981 WT states: "Jehovah is not pleased if we receive that food as though it might contain something harmful."
Jehovah must be quite messed up, if dispensed food could be harmful, but Dubs are expected to consume it anyways.
(Also Luke 6:43 For no fine tree produces rotten fruit)
(That 1981 WT also says "True, the brothers preparing these publications are not infallible. Their writings are not inspired")