I cannot understand the fear this article explains. If it tried to express that it came from the fear of having his private data known to the world or even a few people, I would understand.

But the article explains that he doesn't want targeted advertisement that no one knows about. In fact this is kind of a fear that machines will find out about his data. And although AI has really grown into something powerful, it has not yet come to the level of conscience, so I cannot relate to the fear of a computer having my data.

(P.S.: I do understand if we are talking about Google handing data to other companies or the government, but that goes unmentioned here)