I cannot agree with that statement just based on personal experience.
Most creative people that I have known are so focused on their work that they never notice what's around them or other people's reactions. To just be creative does not take courage. I think there are more creative people hiding around us than we realize with stacks of painting or a collection of short stories gathering dust in forgotten corners of their homes.
It is when you open yourself to others opinions that courage is needed. After artists display their work on the wall,(in the gallery display, on eBay, etc,) everyone feels free to express their opinion on one's work, if the work is any good. The worst thing to happen is no reaction - you have not connected at all. One can always just keep things private and hidden, although that is a very miserable way for most creative people to live, unless they are that rare type of person that does not care what people think.