You can to. I like to tell people to take a warrior mentality. Let nothing and no one stand in your way. If Oprah's producer does not answer your first phone call, call again, and again, and again and again until you get two minutes to pitch. And it that pitch doesn't work, come up with a new one and call again and again.
People talk about pain and fear.
If you want to be a success you have to get past these. It's this simple. It's not for you. And if rejection causes you to be depressed and have an upset stomach, then this is not the biz for you either. Get your own ego out of the way.