I don't know any better

There are so many things that I don't know. Some of these things I felt like I should've known. Had I spoken to more people, had more life experiences, asked more questions, I would've known. I have certain standards of myself, perhaps a wee bit unrealistic, but I expect myself to know a little bit about everything especially what I consider common topics. I beat myself up for not making certain decisions in the past that would have led me to know what I should've known. My psychologist says "should" is fuck all. If I sincerely don't know, why would I beat myself up for something that I don't know? Well because I should've known. He says, the fact is you don't know, end of story.