It's something you can see even in content from 5-10 years ago. A lot of people in lower end content are used to just being able to ignore mechanics because they tickle and do almost nothing else, so as soon as you reach any duty finder content that has actual lethality(Lahabrea and Igeyorhm/Ascian Prime, the Nier raids, etc), people will sit in the AoEs, fall over, and then just keep falling over because they never learned what to watch for. I even made callout macros for Aetherochemical Research Facility because people, sprout or not, couldn't understand what to do for things like Dualstar and we would keep wiping until someone left.