If I know every tackle and trick in soccer but don’t know how to play with my teammates, I will likely be useless.
I may be the best guitar player, playing solo, but I struggle to play in the band; my skills are limited to my room.
Similarly, enterprise software projects are a team sport. Our individual skills and uncoordinated effort don’t lead us too far. We may do many activities without making much progress. We must understand each other and work as a synchronised effort for projects to succeed.
Audiences don’t see how well the individual musicians perform. Instead, they experience the stage performance.
Our stakeholders are not any different.