“I’m used to performing under pressure, but that’s playing football”

Simplified Meaning:

Playing football involves dealing with a lot of stress and tension, like when a player has to make a critical move in a packed stadium full of shouting fans. The person is saying that although they are comfortable handling the stress that comes with playing football, this experience doesn't necessarily help them handle other stressful situations in life. For instance, pressure at work or personal life problems can feel very different and might be harder to manage. Think of a firefighter who's used to the pressure of saving people from burning buildings. They might struggle with the pressure of speaking in front of a large audience, even though both situations are stressful. The key idea here is that being good at handling stress in one area doesn't mean you're automatically good at handling it in another area. To apply this to your life, remember that it's okay to find some situations more stressful than others, even if you're usually good at dealing with pressure.