"When the homeowner confronted the assailant with a firearm, an assailant shot the homeowner in the arm."

So why didn't the homeowner shoot first? 

Because like most of people who own guns have no training or experience in that situation. Most of the posters fit this category. 

These gun owners make it dangerous for the public.   

Get training or don't buy a gun. Shooting an old fridge in the gravel pit isn't training. 

Crawl through my window, you will take several .45 rounds center mass guaranteed.