Chicago (proper) has some of the most restrictive gun laws in the nation. You don't actually think people have to run to the suburbs to illegally acquire guns, do you?
Is your assertion that if you simply made gun laws super restrictive everywhere, that the tens of millions of illegally acquired guns now would...vanish? Be confiscated? If so, how?
I've been a gun owner, I'm far from anti-gun. I believe in the right to bear arms. That said, I think our society has had an unhealthy infatuation with guns for too long, too. And it's not the guns themselves, but that they represent such an escalatory power that's our problem.
Used to be if assholes were bullying a kid, that kid for revenge might fuck with the bully's possessions. Egg their house or fuck with their car. Now it's suicide or coming to school and shooting people. And that's exceedingly rare compared to run of the mill dustups that now end with shots fired. Normal bar fights or traffic altercations end with someone shot dead when in the past that was extremely rare. Yet...we had readily available guns then, too. The difference is that people valued life more. We now live in a world where most interactions are digital. Giving a fuck about your fellow man is an annoyance. Easier to shoot them in the face when you disagree with them.