I don't think you know what gun control means?
Nobody thinks guns should be outlawed. Seriously. There's pretty much no mainstream supporter of gun control who thinks guns should be outlawed. Those aren't the same thing.
Supporting gun control means you think guns should be harder to access, or limited to fewer people, or [insert reasonable restriction here]. You bring up examples of cars, planes, and knives, but there are reasonable restrictions on all of those. You can't drive a car without a license. You can't fly a plane without a license (and also you need to be cleared with ground control and a hole bunch of other stuff? It's complicated). You can't even fly on
a plane without passing background checks and using government-issued photo ID and a whole bunch of other stuff. And there are few restrictions on knives (because those are far less dangerous than cars, planes, or guns), but it is illegal in the USA to use certain kinds of switchblades. And some states don't let you carry concealed knives without a license. Why? Because they're dangerous, and the government puts certain restrictions on them.
I'm sure you would agree that there should be some
restrictions on guns. We have to ask ourselves what restrictions should be placed on guns. Someone who is in support of gun control thinks that there aren't enough restrictions on guns presently. I happen to agree with that. It's way way way too easy to acquire a gun in the USA. This doesn't mean I think nobody should have guns, and it doesn't mean I think law-abiding citizens should be prevented from having guns. But I do think we need to put more protections in place.
For example, I think people should have to pass a background check before being allowed to have a gun. People with mental illnesses or a past history of criminal activity shouldn't be allowed to own guns, and this is a restriction that makes sense. Unfortunately, it is not a restriction we have. Another reasonable restriction is to have people take a gun safety course before they are allowed to get a gun. There are far too many sad stories about people who were accidentally killed because they didn't know how to operate a gun, or because they stored their gun incorrectly and a child got his or her hands on it. These deaths are preventable (not all of them, of course, but a large proportion of them are) through safety training. The deaths caused by Dylann Roof were preventable through a better background check system. Law-abiding citizens would still be allowed to get guns under these reforms. In fact, they would be better equipped to handle guns safely. That's the ultimate goal of gun control. It's not to remove guns or steal people's rights, but to put reasonable restrictions on something that deserves reasonable restrictions.
You mention cars, comparing them to guns. Yes, people can use cars to kill people. But how often does that occur? Every year, there are about 300 car-related homicides in the USA, while there are about 11,000 gun-related homicides (source
). (Cars technically cause about 10,000 more deaths overall, but 1. those are accidental deaths 2. cars are used more frequently than firearms and 3. there are about 30 million more cars than firearms in the USA).
It is far harder to gain the legal right to operate a car than it is to gain a gun. That needs to change.
PS: You mention how people can use things other than guns to commit crimes. Accurate, but you forget that those things are far less dangerous than guns. I could reasonably defend myself from someone with a knife, but not from someone with a gun.
PPS: You also say that criminals would just break the law and acquire a weapon illegally. However, there are plenty of restrictions that can limit that as well (eg before people purchase a gun they have to demonstrate they can store it safely). And most criminals are only willing to expend a certain amount of effort and resources to commit a crime. A person who can't acquire a gun legally would have to turn to more expensive, dangerous, and difficult sources. This increases both the difficulty of committing a crime and the chance police officers catch the criminal before the crime is committed (if you're depending on other people to commit a crime, your crime becomes more visible).