You can have the best ideas in the world. You can be the most profound person. You can have the secret to a happy life.
If you don't know how to present these, however, you aren't likely to get your message out.
If your website is full of broken images, people aren't going to stick around. If your fonts are hard to read, no one's going to power through. If your words are printed on a neon green background that hurts the eyes, no one is going to notice what's written on it.
Substance is important, but looks could decide if people stick around to read your content. So, spend time on your container or get the help you need to create a visual that people will be able to work with.