You make good points. When I looked up the word "immortality" in Merriam Webster while writing my first comment, I found it interesting that one of the definitions was actually "lasting fame."
> we remember factoids... I might remember 7 things about Teddy Roosevelt... but those things do nothing to represent the complex individual he actually was.
I've thought this before when looking at Wikipedia pages. Especially for less famous people with thin pages, they'll cite just a handful of news articles or press releases in which the person appeared. If there were a page like that for me, or the people that I know best, the collection of factoids would be a laughably inaccurate reflection of who we really are. Someone told me that it's important to write an autobiography for this reason.
My grandfather wrote a short autobiography, just for his immediate family. It's a really nice thing to have.