People need to talk to a therapist about their fear of airplanes, whether it’s rational or not. People have to talk to a therapist about car crashes, whether it’s rational or not. If you are worried about something and it causes you anxiety, you should talk to a therapist. The source is not my concern, the help you need is.
That's not what therapy is for. If there is a real life problem causing you anxiety or anger the solution is to fix that problem of to remove yourself from the situation. Talking to a therapist is not a solution to real life problems. Anxiety, fear, and anger all exist for a reason and they can all be productive emotions in the right context. The only time you should see a therapist for a rational concern is if said concern can't practically be escaped or fixed.