Tracts do not disciple or build a relationship with another person. They simply get the gospel and the word of God out. I personally believe tracts are vital to evangelism. But they are not the whole picture or even the major picture.
People need to be properly taught and discipled in a local Bible-believing church to grow in the faith, receive proper training in the doctrine of the Word, and grow a strong-rooted faith. If you are discipling someone in the faith, teaching the Bible, answering their questions, building trust and relationship with them, and they ask to pray with you for their salvation, by all means, pray!
But tracts don't do all that. Tracts are just a small beginning. They call the lost, proclaim the gospel, and may even convict of sin, but they can't disciple a soul.