> If he can achieve his goal will mean that a lot of people could do that and there is nothing special in that project.

I think that's kind of the point of his personal challenges. He's trying to set an example of being intellectually curious, not show off that he's a genius. Wasn't one of his previous projects for the year to learn Chinese? A difficult challenge, but not a superhuman one. Plenty of other people are capable of it.

There are things to dislike about Zuckerberg, but I don't think these challenges are one of them. They're pretty admirable imo.