My entire knowledge of the subject is what she said in that quote and I'm otherwise ignorant of the subject from a professional perspective so I'd just be guess

My entire knowledge of the subject is what she said in that quote and I'm otherwise ignorant of the subject from a professional perspective so I'd just be guessing if I was going to elaborate, but I can tell you what I took from it: to me it meant that most people are a little deluded about their lives. Some productively, some not so much.