"By becoming “the wounded person,” he vicariously experiences their suffering. " from the grammarly post.

Pain/Painful is in the definition of empathy ... "he action of understanding, being aware of, being sensitive to, and vicariously experiencing the feelings" https://www.merriam-webster.com/dictionary/empathy

So you don't have to have any drama. I have a very empathetic friend: it happens to him in any situation (meeting smb happy, sad, angry...). trauma is usually limited to a specific situation from the passed. Does not fit that case.