Agree. Demis is very smart, but obviously less humble and more interested in self-promotion. There have been multiple Deepmind documentaries that mythologize the Demis origin story.
Not sure it's being less humble so much as the story being interesting for the public - chess wizz and game developer out to solve intelligence, makes AlphaGo tha beats humans at go, AlphaFold that gets the nobel prize. With Jeff Dean developing Bigtable and Spanner, no general public know what those are.