Knowing how something works is not the same as having the tools to change it.
Discovering memories are incorrect does not massively change who we are. As someone with a very defective memory, I discover on an hourly basis that I'm won't about something I thought was true, but there's still continuity and consistency to my personality and general approach to life.
...in fact, as someone who was raised an evangelical Christian and believed wholeheartedly without a shadow of doubt, then lost my faith entirely in my late thirties, I sort of did have my "introductory paragraph" changed, yet my wife, children, and friends would all say I'm still me, and that my core personality and nature remains largely the same.
> Are you aware of the Recovered Memory Therapy Scandals of the 80s/90s ? Boy did that ruin a lot of lives. You can rewrite a human by changing their 'introductory paragraph'. It's just not as accessible.
The recovered memory scandals are not even close to evidence that you can rewrite a human.
The people who thought they had learned new facts about themselves did not suddenly lose their context as humans in 20th century America.
They did not suddenly lose their sense of humor, or develop a previously-unseen penchant for murdering small children.
They experienced a revision of belief, and a pretty major one that really distressed them, but it did not change everything about them.
LLMs _do_ manifest wildly differently based on the first paragraph.