I don't think you know what you are talking about. The original use of "trigger warning" was very specifically intended for use on graphic material that could trigger a dissociative episode, for example an explicit description of child abuse or rape.
The phenomenon you are referring to - appropriating the language of PTSD for concerns of politics, taste or personal offence - is exactly why some people advocate replacing "trigger warning" with "content warning" or similar (and not because of associations with gun violence, as OP asserted).
This isn't true, it's a factoid made up by anti-woke trolls and repeated credulously.
"Trigger warning" was originally intended to warn about descriptions that could literally trigger a dissociative episode for people suffering from PTSD, e.g. victims of child abuse or sexual violence.
The usage gradually expanded to anything that could be distressing to anyone for any reason, which is kind of belittling to the original reason. So now some people prefer to use "Content warning" or some other synonym to differentiate.
It's nothing to do with the word "trigger" being associated with guns.
> The retail executives and police officers emphasized the role of organized crime in the thefts. And they told the supervisors that Proposition 47, the 2014 ballot measure that reclassified nonviolent thefts as misdemeanors if the stolen goods are worth less than $950, had emboldened thieves.
You are quoting the police and business owners, who are very much a biased source. How do they know what the causes are? Do you think they've commissioned a survey or done research? It's just as possible they were against Proposition 47 to begin with and the NYT is supporting their agenda for their own reasons.
"An example: early on in my Twitter use (I was going to say “career”) I saw a Tweet from Stanford Libraries that they had digitized a significant chunk of the transcripts of the French Revolution. I was teaching class that afternoon, so I did a little exploration and put up some preliminary results as an example of how to explore datasets. Three years later, with colleagues in computer science and history, we published an award-winning paper based around that data.
From the point of view of Twitter, however, this is a massive fail. I saw the Tweet, and logged off to work on it."
The phenomenon you are referring to - appropriating the language of PTSD for concerns of politics, taste or personal offence - is exactly why some people advocate replacing "trigger warning" with "content warning" or similar (and not because of associations with gun violence, as OP asserted).