I don't find this any different than seeing an exposed jinja template: "{{product_name}} is perfect people who work in {{customer_industry}}" or the typical recruiter "Dear {{candidate}} I read your profile carefully and think you'd be perfect for {{job_title}} because of your experience at {{random_co_from_resume}}"

If anything, I think it's kind of cool that we're seeing LLMs actually used for something very practical, even if it is spammy (I mean I don't think template engines are evil just because they make spam easier).