To be skeptical of the resultant text of the New Testament books is to allow all of classical antiquity to slip into obscurity, for no documents of the ancient period are as well attested bibliographically as the New Testament.
In 56 A.D. [the apostle] Paul wrote that over 500 people had seen the risen Jesus and that most of them were still alive (1 Corinthians 15:6ff.). It passes the bounds of credibility that the early Christians could have manufactured such a tale and then preached it among those who might easily have refuted it simply by producing the body of Jesus.
The difficulty with pragmatic arguments for a religion is that truths do not always "work", and beliefs that "work" are by no means always true.
