"Why didn't I call 911? I had seconds, they take hours to come! Time was of the essence. I didn't have hours!"
Inconvenient truth, if you're a totalitarian anti-gun-liberty Leftist.
What they believe, while trying to avoid admitting it, is that people like this 92 year old man should be left to the mercies of their assailants. If that means victims end up brutalized, raped, or killed, well it's a sad thing but so virtuous and noble.
Every advocate of draconian gun control is effectively saying to every single person who used a firearm to save their own or another's life: "You shouldn't have been able to have that gun." The only conclusion you can draw is that they believe whatever was going to otherwise happen to those victims would have been the preferable outcome. And they congratulate themselves for thinking this way.