I think it's more a percentages thing. Reddit has been around for a long time and has about 50 million active daily users with countless subreddits so you are bound to get a lot of nonsense getting seeded from there onto social media. Plus, unlike FB you do not need to subscribe to browse. There is a lot of quality posting that goes on there too. The problem is, most people see something and post it on their FB page without ever looking into if it is actually true. Don't forget, there is lots of propaganda posting acoss all social media, globally, by paid shills. China may be the worst.