Language constantly evolves. So it’s a little unfair to say anybody is trying to change a definition. In specific professional contexts, definitions are necessarily much more precise. Because in these contexts definitions have consequences. But in general dialogue being pedantic and sticking to a strict definition generally just makes you an ass.

In psychiatry trauma has long been defined much more narrowly than just acute stress. Specifically exposure to actual or threatened death, serious injury, or sexual violence. So not just any acute stress but stress associated with real life violence. That’s the DSM definition of trauma for PTSD and you’ll sometimes find nitpicky professionals sticking to this narrow definition. But it’s not how most people use the word.

I think it's understandable that someone with the experiences to give them "real" DSM-defined PTSD might look sideways or roll their eyes at someone claiming PTSD because they had strict parents who made them go to church or didn't let them play video games. Doesn't make them an ass.