onclusion: Most people are good and trustworthy people

Hi,

Ever since Linda was little she’s been taught in school that most people are good people and trustworthy people, therefore she should in general not hold any prejudices and expect other people to be evil and take advantage of her.

In other words: The authoritative school teaches that most people are good and trustworthy people, therefore Linda finds it justified to believe that the world most likely consists mostly of good and trustworthy people.

Do you see any fallacious reasoning in this? Is the conclusion justified?