Victim of violence. Ie, most people are there to steal your stuff and run if confronted. Also it notes that 61% of offenders were unarmed when the violence occurred, and of those who experienced violence only 9% sustained serious injuries, 36% sustaining minor injuries.
Basically an aggressive home invader unknown to the victim, willing to and successful in seriously injuring them, versus an armed home occupant... that's unlikely in the extreme.
Even in the US :P