The reason is very simple: they do not know that fruit bearing is the one thing they have been saved for. Just as entirely as Christ became the true Vine in order to bear the fruit of life, you have been made a branch in order to bear fruit for the salvation of men. The Vine and the branch are equally under the unchangeable law of fruit-bearing as the one reason for their being. Christ and the believer, the heavenly Vine and the branch, both have their place in the world for one exclusive purpose