Automobiles are an absolute necessity for most Americans whereas guns are not an absolute necessity for MOST Americans.
I own a lot of guns but don't absolutely have to have them as I don't feed my family with them(I hunt but more for enjoyment than food even though I do eat the animals). In my lifetime I have never had to use a firearm in SD or HD despite the fact that I carry every day and have them for HD as well. Necessity? Not for the vast majority of gun owners.
Are cars that can easily go 120 MPH a necessity? Are 4k pound SUVs a necessity? I own 4 automobiles all of which are specialized. A family "grocery go getter", a travel truck, a hunting truck and a fun in the sun SUV. That doesn't count the farm vehicles or RV. All 4 of these are easily capable of breaking the law in every city, county and state in the country just by my pushing the gas. They are all capable of killing purposefully and indiscriminately simply by swerving into oncoming traffic or maybe heading up a busy sidewalk.
None of this means that YOU have the right to tell me what kind of automobile I can have in America nor what kind of firearm I can have in America. There are certainly limits on what we can have as firearms owners as well as what we can have as car owners(despite the commercial where Dale Jr trades his car for a Dew). Without firearms in the hands of Americans we would have a vastly different culture. Less deaths(debatable I know but assuming NOBODY had access to a gun), less lead in the environment(sheesh), etc, etc. The same is true of automobiles for without them there would be FAR fewer accidental deaths, much cleaner air, much less asphalt, much more disposable income, etc, etc.
Without guns we could depend on the government to keep us safe from ALL enemies. Without private automobiles we could depend on the government to get us to work on time and to the grocery store etc. What could be wrong with that plan?
I intend to do my best to make sure Americans continue to own most of the world's guns.