How exactly does insuring something make that object safer?
I never said it did, but what insurance does is establish personal accountability and responsibility. Those two things will lead to safer gun ownership because with mandatory gun insurance, suddenly the gun owner is now responsible and liable for the damage their gun will do.
It's why if you drive recklessly or your car gets stolen, your insurance premiums increase. So to stop that from happening, you act responsibly with your car. Same case works for guns.
Didn't say that only a gun can do that but if you think an unarmed man is a good match for armed intruders I have to say that I'm very pleased to meet you Mr. Chuck Norris. SIR!
If they do, it's usually because they didn't know someone was there. By advertising your gun ownership (with an NRA bumper sticker), you are telling thieves that one of the three things they look for (guns, cash, electronics) are in your house. So when the thieves wait for you to leave and then break in, they're looking for your gun. A gun that they will then either sell to other criminals or use themselves.
You are also more likely to have your gun stolen than you ever will be likely to use it to defend yourself from home invaders.