I think most of us would agree here that "violent media creates violent people" is false. But violent media can still be a problem, if it is caused and enabled by a pathological society, a symptom of that pathology. I personally think it is, and I think that's the point the post you were responding to was making.

I don't think it is any coincidence that most of the violent gun-laden media you consumed as a child was American.

Killing is a* fundamental problem-solving strategy in American culture (both domestically consumed and exported). And the overwhelming most common method of killing is a gun. This is why it is very rare to find a film or TV show with any kind of action/adventure/thriller/crime/mystery plot without guns, usually on the poster.

When this is true in other countries, it is usually because they are intentionally aping American media.

I think it has never occurred to most Americans that there is any alternative to 'kill the bad guys'.

* On reflection it is probably 'the' fundamental problem-solving strategy in American media.