For Example: Emma Stone, Prince Harry, Ryan Reynolds (he kinda gets an asterisk thought), Selena Gomez, Kim Basinger, Missy Elliott, Adele, Severide (off Chicago Fire) , Megan Thee Stallion, and Stephen Colbert to name a few. Why enter in or try to get in a job where you know your anxiety disorder is going to get to you and try to repress it? Why not choose a different job?
Your entire premise assumes that they have anxiety before becoming famous. People’s lives change and so do their conditions.
Do you really believe a bunch of anxious people one day decided to become famous to increase triggering their anxiety?