Humans are notably bad at evaluating low probability, high impact risk. An ICE car burning in the street has lower potential for life threatening damage than a

Humans are notably bad at evaluating low probability, high impact risk. An ICE car burning in the street has lower potential for life threatening damage than a PHEV burning when in a garage of a house overnight (ignoring the difficulty fire crews have dealing with battery fires). Besides, Volvo has safety at the heart of its brand image, so it makes sense that they would issue an overly cautious warning.