Big A.D. said:
Sure, the world isn't always a nice place and there are threats out there but very, very few of them can be effectively reduced by you, me or anyone else having a firearm within easy reach.
That's not to say guns aren't really f**king cool either, because they are amazingly awesome pieces of machinery. It's just that they can be really dangerous and unless there's an actual need for them then simply having them around because it kinda feels good isn't really a great reason to make them legal to own outside of the very limited number of circumstances where people already can.
People that want this right aren't intent on "effectively reducing more than a very few threats". They are hopefully never going to need to use them for such use and they are intent on only reducing that small number (if any) threats that come their way in their life times. But in saying that there is a very good saying that goes along the lines of: A gun is a wonderful thing to have and not need but a horrible thing to need and not have". Or words to that effect.
And on your last paragraph, the "having them around because it kinda feels good" shows your prejudice against people like me that feel comfortable having firearms around because inherently you think that I don't really need one so you are happy for the state to force me to not have the means to protect myself. Because it feels good to have one around certainly isn't a reason, because it feels good knowing that I (and my family) have a very high likelihood of surviving a lethal force encounter is a perfect reason to make them legal.