The whole-team approach in agile methodologies is beneficial because it leverages the diverse skill sets within the team for the project's benefit. In this collaborative environment, team members, including developers, testers, and business analysts, work closely together from the project's outset. This close collaboration ensures a better understanding of the project goals, more innovative solutions to problems, and a higher quality product. The whole-team approach encourages knowledge sharing and collective problem-solving, leading to more efficient and effective project outcomes. This approach contrasts with traditional methodologies, where roles are more siloed, and collaboration between different roles occurs less frequently.