Firstly very few people know for sure what their career will involve when they are teenagers. The world of work is constantly changing, and your skills and interests might be different than you predict now.
Even if your future career never involves science, I think learning about science (to some extent) is good for everyone. It is about understanding the world around us but also it is about thinking clearly and gathering evidence. Making decisions based on evidence is important in lots of careers that don’t involve science directly.