I'm reading about the new technique used in this journal article but I'm not sure if it's really as 'innovative' as the article says. The researchers are asking

I'm reading about the new technique used in this journal article but I'm not sure if it's really as 'innovative' as the article says. The researchers are asking asking ChatGPT to impersonate political officials and are using those impersonated answers to compare to its default ones (when not asked to impersonate). This says less about ChatGPT's absolute political bias and more about ChatGPT's political bias as ChatGPT sees it. Or, in other words, how ChatGPT's responses compare to what ChatGPT thinks certain political leaders would say. I'm left with more questions after reading the article and skimming the report. Is this really helpful?