What if they don't like it?
Why are we here? I think it's to create "stuff" with other people. We create businesses, families, art, cities, homes, and lots of great things by working together. Therefore, it makes sense to assume the thing we want most is connecting with another person. We want it so bad. Even worse is the fear we feel when we risk losing it.
Our fear of being alone causes us to hold on to relationships that aren't right. This fear causes us to refrain from saying the things that need to be said. What if people don't agree with us? What if they decide that we aren't worth their attention? What if they leave us alone because of something we did or said?
Brené Brown calls this fear of disconnection, shame.
The fear of not being enough, knowing enough or having enough is strong with people in the "creative field." In the creative field, you have nothing to hide behind. Your work = you. You are constantly being compared and judged. After all, who are you to create that video? What makes you think people want to hear what you have to say? Your logo isn't nearly as good as that one. It's true, you won't be the most qualified to speak on the subject. Your art won't connect with everyone who hears it. Your design won't be the best. The easy way out is to make sure you never share anything, and spare yourself the criticism.
Is your self-censorship worth the price of never making an impact on anyone?