In case of an armed robber or intruder, a reasonable person would assume that the weapon is intended to be used. That includes a crow bar or tire iron being used for breaking and entering, as far as I am concerned.
The fact that they broke in while I was at home is clearly an intent to do violence. They believe that they will be able to subdue me, or kill me. They can only assume that I would resist. Therefor I am not going to see what weapons they brought till I drop them.
I may be old, but I am not stupid.