If the mission of the church is to only make disciples, then what are we making disciples for? Being a disciple is about a new way of living, about a new humanity and a new society that Jesus called the kingdom of God.
So perhaps the mission of the church is not conversion by itself but transformation of human society. It's nothing less than political change, but not political change through the political process. This political change comes about through the personal process.
The goal can only be the creation of the kingdom of God here on earth through the lives of disciples. If one's church isn't doing that, is it really pursuing the work of God?