Nobody can prepare you for becoming a professional athlete. Literally everything is put under a microscope from what goes into your body from a diet and hydration point of view to every single detail of the team’s and your own individual preparation each week.
The objective for everything that comes under this microscope is about constant improvement and how it ultimately benefits the team. This includes how you handle the media attention. For many players one of the hardest skills to develop (and one of the most crucial) is effectively interacting with reporters and how you manage the constant commentary (both positive and negative) from the media.