Yes, they are both entertainers. But they have also both suffered from phobias.
Fear is a normal response to danger.
It's perfectly natural to be scared of a snarling dog or a sudden loud noise. You may even feel feelings of dread when you are anticipating an unpleasant event, such as taking a test you haven't studied for. Fear becomes a problem when you are experiencing an overwhelming amount of it for no real reason. When you try to control that fear by rearranging your life so you can avoid certain situations, then a phobia is at work. If you were chronomentrophobic, you would be afraid of clocks.