One thing is not clear. The guy complains about “imperfections” which looked like some kind of stains on the inside, but did not say if they actually caused any problem optically. Then he complained about the text being blurry (or very small area in focus), which, I believe, cannot be caused by those imperfections but something else.
So while I believe both experiences are authentic, I am not convinced that his conclusion about the relation of the two is correct.
My Quest 2 doesn’t seem to have those lense flaws after I shined my phone’s flashlight on them. Picture quality is very nice. G2 is still quite better. Will be making a review soon!