It's weird then that the USA is one of the worst countries to raise children. In fact based on social metrics the USA is just not a great place at all.
The problem with the USA is it is unwilling to try anything, for example gun control. Most other countries do have gun control and the results speak for themselves, much lower deaths and guns are NOT the biggest killer of children, unlike the USA.
Yeah you get the same BS, the USA is different, we have our rights, etc etc etc, but put bluntly the USA simply accepts the problems as being unsolvable and is an acceptable outcome so they can keep their precious guns.
Your story about someone magazine out available for the child. Strawman.. The covers on many porn mags is highly graphic, so by entering the store kids are exposed to porn. Stopping at the door is a far superior solution. Never mind the fact that some of the clientele would take advantage of the kids in the store.
In NZ, to get a gun you need to have a gun licence. To get a licence the police will do a background check, mental health checks, you must go through gun handling training course, and it includes asking neighbours, ex partners, etc etc if you should be allowed a gun.. There significant restrictions on what firearms you are allowed. If you say you want a gun for "self defence" you will be forever denied a licence. The gun must be in a locked cabinet, the bolt and ammunition must be in a seperate locked cupboard. Police can come and inspect at will. The licences require renewal, etc etc etc etc
Severe restrictions on handguns, limited to gun club members for shooting events only.
But people still have guns, mostly for pest eradication / hunting, though target shooting also exists.
AND... we have significant less gun crime, per 100,000
US gun deaths 4.42 per 100k, Australia 0.09 per 100k, and NZ is lower than Australia.
But the USA is convinced their way is the only way... blah blah blah.
US violence crime has remained about the same since 2011 with variations slightly higher and lower.
I would expect gun crime to rise in the USA due to financial issues and greater poverty.
US laws do not apply to the external world, so the anti-discrimination bit is a straw man , never mind that discrimination is alive and well in the USA anyway.
But here is the real issue. We know doing nothing does not work.
So give a solution, tell us all how it can be done.
How would you protect children from exploitation, from harmful goods and services.
Parental responsibility ?
Education ?
50% of parents are below average , so that's not an option, unless all you want it to be just someone to point a finger at and blame them.
50% of adults are not computer literate (and that's generous, I would say 70%) , so that's not going to work either
Many parents are working 2-3 jobs and dont have time, its either work or starve, US support services suck badly.
Education ?
The US can not even get sex education done properly. They are as hell dont teach "No means No", and they are taking away a woman's right to bodily autonomy.
Many topic require time for children to learn other things first. We dont tach 5 years olds calculus , but we do start with simple addition. So teaching kids critical thinking to where they can comprehend it is probably around the age of 14-18, again it's a complex subject and takes time to teach.
Meantime you have the likes of Faux News spewing blatant lies at them in their homes, as well as evangelical churches, etc etc etc so their chances of learning are severely hampered in the USA anyway.
And the US school system sucks badly too.
But feel free to give a solution that will work.
Bottom line is like everything, you make a start and then refine it over time, that seems to have worked for most things in life.
I dont expect anything to be perfect, heck for something it will require societal changes to take place too, and that takes time,
I propose do something, its a start, and once it has started making incremental changes becomes easier.
What's the saying "The longest journey starts with the first step"
And one last thing, the USA is not the best, the world does not want to be like the USA so the usual myopic us centric ideology is not going to work here either.