As for myself, I try to do a thought experiment. Imagine that I could travel back in time and meet myself at 18-20 years old. I could most likely convince myself that I was me from the future. But I don't think I could convince myself of the thing I've learned that are outside of what is imaginable for my younger self. So we could never be angry with other people for not understanding. Even so, with everything that you get right compared to the people downvoting you, I think you have a too simplistic view of reality, and frankly, not optimistic enough.