The same TV and movies - glorifying violence -, the same shoot'em up video games are being watched/played in Australia and the other countries with strict gun control.
They DO NOT translate into mass shootings.
In Australia and the other countries with strict gun control, certain guns being illegal DOES NOT translate into every loser who wants to shoot people because he's depressed being able to get his/her hands on one via the black market.
As such, both of these arguments are obviously fallacies, merely empty rhetoric whose purpose is to avoid addressing the real problem: the ubiquity/easy access to assault guns/high-capacity magazines/etc in the USA.