It not /all/ about triggers it's partially driven by the algorithms on some social sites like TikTok or Youtube where there's some evidence and a lot of speculation that mentioning or including certain words can cause the recommendation algorithm to suppress your videos etc. That leads to a lot of homophones etc popping up like "sewer slide" or odder non mentions like unalive popping up. Because the really big channels care about maximizing reach for monetization reasons it shows up strongly in peoples feeds which drives wide adoption.