I wouldn't call myself an expert. I didn't spend a whole lot of time there (although something tells me I still spent too much time and should have GTFO'd the first time I heard the word "decisioning" being used entirely steaightfacedly). And Hackernews is full of people who think themselves experts and have strong opinions, but are really nothing of the kind, particularly in the field of health and medicine. The real experts tend to keep quiet while the pseudo-experts post anecdata about how everything from rolfing to mewing changed them from bedridden invalids to Matterhorn-conquering climbers.