I would guess if asked Harari would actually revise that lower. The point was: even those arguing most strongly that AI is an autonomous historical force can slide back into the mere abstract recognition of it. In context, Harari was saying "I'm speaking to you as a writer now, but my own standpoint will eventually be undermined." I'm saying "yes, and your 10-year timeline suggests you along with all of us are not taking your own thesis seriously enough."