Somehow, inserting mRNA or DNA into people—which conceptually results in vaccination when effective—somehow became not genetic therapy. Now, after a great deal of Wikipedia editing, “gene therapy” gets defined according to gene modification. And that’s an extremely weird definition unlike all other medical therapies because it means you don’t actually know whether something qualifies as gene therapy…until you see the results. 

“So, doc, is this technique you’re recommending a genetic therapy?” 

“Well, we’ll just have to wait and see, now won’t we?”

Also, you’re not allowed to ask related questions about epigenetics. At all. You just have to pretend that you’re not thinking about it in terms of results that modify genetics sometimes.