Most burglaries happen when the occupant isn't home. Unsurprisingly burglars don't like people to be there when they break in. Guns don't operate themselves so it's not crazy to think that people who have them would have their homes targeted.
If you break into an unoccupied house, that’s burglary and is a relatively minor crime. If you enter an occupied house, it’s more likely to be considered robbery which is considered to be a serious violent crime.