Unfortunately from a realistic standpoint even with gun control laws this will not be an impossibility, though they may reduce the frequency. There’s already upwards of 600,000,000 guns in 50% of the populations hands (and women won’t stop buying them, they’re the fastest growing group of new gun owners. More specifically black women followed by all women), even if you ban them they’ll be out there.
And unfortunately Rittenhouse was textbook self defense, he only shot the guy who grabbed for his gun, and then the guy who hit him with a skateboard and grabbed for his gun, and then the guy who pointed a gun at him, not any of the people who retreated or didn’t attack. I know, he lived in a different state and commuted 20 min to kenosha for work every day where his friends and dad lived, but the gun was kept at Dominic Black’s house and never “crossed state lines” (also, even if it did, it is legal to cross state lines with a gun so long as it is legal in the state, and WI is far more permissive than IL, any gun legal in IL is legal in WI by far.) Also it is legal for a 17yo to have a gun in WI for some reason. Unfortunately even if we agree with his political opinions we currently can’t put him in jail for that, he didn’t actually break any laws.