Zbyněk Vybíral: Why popular and unscientific claims in psychology and in psychotherapy come to be accepted as true? In the paper “familiarity backfire effect” is mentioned. Other process is called as “life advices from The Little Prince”. Further explanations for popular simplifications are searched and suggested. The paper is focused very concretely on several examples, like Albert Mehrabian’s “the 7%-38%-55% rule“, bystander effect, “Marshmallow test” of delayed gratification, behavioural priming or seductive allure of neuro-explanations in today’s psychology. The today’s psychology stands not only within replication crisis, but also within scientific crisis. The historical roots in early psychoanalysis or in some Maslow’s and Eysenck’s statements and mission are mentioned, as well. Critical psychology and critical scientific thinking offer several explanations for so widespread pop-psychology and pop-therapies, which should be repeatedly discussed.