Very good point! (Disclaimer: Lead Backend developer for Presseract here.) When we set up the page, we couldn't actually know what sources he reads, so it's obviously not totally accurate. We did, however, create a page with an assortment of things we thought he might want to consume, but as that's only half the story with Presseract, we also put some things we thought he would want his fans/followers/readers to read.

Presseract, unlike other newsreaders, isn't just for personal consumption-- it's outward and inward.

So if a public figure like Paul Graham were to make a profile there, they'd want to show the world the content they care about--both what they wrote and what they read--to engage with their audience.