Where are you getting this? The new optics have only recently been put into mass production. Not all units with 191s can be expected to have them on day one because there is something called manufacturing
. Furthermore, there have been plenty, I mean a freaking boatload of images on this very thread that show the new rifles paired with optics, not to mention many images elsewhere showing the new optics mounted on QBZ-95s. So I don't understand how you got the impression that there are trust issues with the optics. Also a real possibility is that they are still going through the familiarization process with the 191, meaning they're required to be trained to use the iron sights, thus explaining why in those particular images the optics are absent. These are just some of the far more plausible explanations on why optics are missing in the images.
P.S. Use your head and have some common sense