What has he explained is "not the case"? That he only reviews good products because the bad ones are sent back (which is what I said)? Here it is:
I would disagree and suggest this benefits the manufacturer (advertiser) and the magazine (revenue), to the disadvantage of "the punter", who is none the wiser.
If a car reviewer only reviewed good cars because they sent the lemons back, it would make for very dull reading, not to mention questionable journalism.