I think the belief that most people are good actually causes people to attack the ones calling out bad behavior, rather than calling out the bad behavior itself, which is a major contributing cause of many societal issues. Some people are truly just bad people, and we need to learn to accept this. I did after the last few years in politics. Can't be an algorithm when they elected the president. "Stay positive" is bad advice when you're trying to accurately identify and solve a problem where things aren't positive.