The disciples are called to focus on others. It is this cause that creates the "must-ness" of Jesus' team, not the community of the team that creates the "must-ness" of the cause. As we say at Mosaic, cause creates community. Unlike many modern approaches, Jesus doesn't make being in community the mission. Neither does he promise amazing benefits to the disciples if they follow him.
He envisions a better future and MUST give his life to this mission. He calls his followers of both the first and twenty-first centuries to give their lives with him to something greater than themselves. When any person hears Jesus' call and recognizes the intrinsic beauty of what Jesus is doing, he will run with red-hot passion and join swords with anyone and everyone who hears as he does.