“This isn’t just [what the thing literally is]; it’s [hyperbole on what the thing isn’t].”
In the UK, Marks and Spencer have a long-running ad campaign built around it (“it’s not just food, it’s...”)
Em dashes are fine too.
Er, sorry. I meant: the purpose isn't just drama—it's a declaration of values, a commitment to the cause of a higher purpose, the first strike in a civilizational war of independence standing strong against commercialism, corporatism, and conformity. What starts with a single sentence in an LLM-rewritten blog post ends with changing the world.
See? And I didn't even need an LLM to write that. My own brain can produce slop with an em dash just as well. :)