I mostly agree with you. I have no problem deciding if I'm a genuinely good person. I am able to determine if my actions are correct and accept valid criticism

I mostly agree with you. I have no problem deciding if I'm a genuinely good person. I am able to determine if my actions are correct and accept valid criticism. This isn't about that. It's about not "letting the bastards get you down." The creative world is rife with people who pooh-pooh your work. Often this criticism is within your own mind, preventing you from developing/creating/succeeding. Having a defense against other people's negativity is an important step to keeping you going. Duke Ellington simply refused to read critics. In today's hyper-connected world, it's difficult to not be "part of the conversation." Having a way to insulate yourself from undeserved hate is an important tool, and knowing the difference is an important skill.