There are bad actors in every field. I would just be careful in using such anecdotes to distract from the overall message, which as you spelled it out in detail

There are bad actors in every field. I would just be careful in using such anecdotes to distract from the overall message, which as you spelled it out in detail seems sound (with perhaps just a note that a 5X ROAS is not bad for most unbranded campaigns, but I get your point).