It's wild, isn't it? Turns out when a website has excellent content warnings and tagging, you don't have to arbitrarily limit your contact with people no matter what they're up to, and as a result its culture is broadly less toxic and stressful! Golly!
I really do think shit like Tumblr only carries on via the momentum of its community history, and not at all because it's a well-designed or healthy website, it's night and day...