I will respectfully disagree.
When a company markets a product, as Dexcom does in publicly stating that the G6 is “factory-calibrated” and does not require calibration except under very specific circumstances, there is a general assumption of “truth in advertising.” In fact, the Federal Trade Commission enforces “truth in advertising” laws that are designed to protect consumers from fraud: https://www.ftc.gov/news-events/media-resources/truth-advertising
Dexcom needs to own up to the quality issues with its sensors that always require calibration, despite the patient/consumer following Dexcom’s instructions about sensor codes.