> any deviation from that is no longer a transcription That's a wild exaggeration. Professional transcripts often have small (and not so small) mistakes, cause

> any deviation from that is no longer a transcription That's a wild exaggeration. Professional transcripts often have small (and not so small) mistakes, caused by typos, mishearing or lack of familiarity with the subject matter. Depending on the case, these are then manually proofread, but even after proofreading, some mistakes often remain, and occasionally even introduced.