I'm not buying it. The number one reason people are posting cat pictures to social media sites and others are liking them is that they are hiding.
They are hiding from the scary idea of facing a blank page, a blank canvas, a blank music score, a new business venture, they are hiding from looking people straight in the eye and saying - this is what I stand for.
Think about how you will feel many years from now when all you will get is a total emptiness in your heart knowing that you had so many chances and didn't use them.
Of course, it might not work. Of course, people can laugh at your art. Of course, nobody will even notice you. So what?
Do it now. This is why you are put on this planet, after all, isn't it?