This is precisely the flaw with many television ministries. They attempt to reach out on a large scale but are limited because there is no house to house fellowship. Our Lord was never satisfied with preaching to large crowds. He worked with a relative small number of disciples who in turn worked with others. He never intended Christianity to be impersonal.
Ministers have limited time and resources.
They can only reach out to a relative small number of people. We ourselves can, and should perform much of the ministry to the church community. This is why the home Bible study is so important to the spiritual life of the community. The small group setting allows people to open their lives and be real with others. Christ did not come to be served, but to give his life for others.