You may have to work alone, or with a group of people to create a great experience for your users. In your career, you are likely to work on projects of variable size and duration.
Some projects will take months, while some will take years to complete. Everyday some work has to be done to advance towards finishing the project.
When you work in big corporations, individual contribution may not seem much when looked separately, but they all add up to the big picture.
There are various scenarios in which seeing the big picture would actually help you better in dealing with the problem at hand.
It is especially important in such scenarios that you are aware of the big picture. Once you understand that every effort you spend now will seem relevant in the future, then your failures won't hurt you much.