You have a similar thing happening with Enchroma-glasses for colorblind. Tons of often somewhat professionally made, heartwarming videos about friends or students buying "expensive glasses" (not that expensive) to someone so they "finally can see colors" (usually without actually saying it directly). And they always go viral with tons of suspiciously similar comments flooding them. All comments about how they actually work, and why they don't work as portrayed are buried by very aggressive comments.