There is also incentive for people to inflate their sense of importance by weighing in on topics they're not qualified on, especially if it's motivated by a sense of familial pride. You can see elsewhere on this thread that arthurcolle self-admits a lack of familiarity with basic interpretation of CPM.
Misinformation, whether ill-intentioned or not, does real and tangible harm to our society. Misinformation about the supposed dangers of nuclear power, as arthurcolle is spreading, are especially harmful because they form the foundation are the biggest obstacle to safe, clean, cheap, and abundant energy that could radically improve our lives at the systemic level.