The intelligence floor for becoming a nurse is low, so nurses have extremely large variance in their intelligence, knowledge, and training. Knowing someone is a nurse doesn’t mean you can assume they are pros. Some nurses keep up with the latest medical research papers and are overall similarly knowledgeable to doctors, and some know less about biology than I do and will tell you about vaccine conspiracies and how some homeopathic nonsense will help you. I’ve met people at both ends.