Sure, the gospel writers regularly report unrealistic things without the faintest mention that they might be wrong. For instance, the writer of Matthew reports that many dead people came out of the graves and appeared to many. How does he know that? He doesn't tell us. But seeing that he probably wrote a generation after Jesus, he would surely be skeptical of his source, even if it was very reliable. People don't come out of the graves. And certainly there are not times when many dead people come out of the graves together. And certainly, had it happened, everybody would have been talking about. And yet everybody seems to be silent about this but Matthew. How could the writer of Matthew have possibly known that his source was right in such circumstances? He appears to have an overwhelming trust in this without question.
When one's bias causes someone to have overwhelming trust in something that appears he should not be trusting, then perhaps the rest of his writings are influenced by his bias.