You know the abundance of Hollywood bullshit on AI going to kill us all? The same thing happened long ago with silencers as they forget about hearing damage from firearms because it isn't seen in movies but worry about "the dangers" of firearms being suppressed to non-hearing damaging levels by equating it with the classic "mouse-fart" level of volume.
Hollywood has a lot to answer for in its damage to epistemology.
As far as I understand it these restrictions on suppressors predate any meaningful impact of Hollywood action films. Suppressors were included in restrictions from the prohibition era largely targeting the fear of the use of automatic weapons by organized crime (the mob).
Feds pictured everyone in the mafia carrying military-grade Thompsons (Tommy guns) despite the fact that they were horribly expensive, produced in small quantities, and didn't sell well. There are actually congressional record of the hearings for the weapons law that make clear no justification was given for including suppressors, it just wasn't pressed by anyone involved.
Hollywood has a lot to answer for in its damage to epistemology.