Because the tools, techniques and insight you will acquire during this experience will help you not just in work, but in everything you do.
Because what you learn here will last FOREVER.
Because, if you want to become a better, more effective project, programme or change professional, you really need people skills, you need to know how to lead, how to motivate, how to inspire people, how to improve your interactions with others and how to help those around you, enjoy your journey together and achieve great things.