Actually, you do need either hard data or some kind of logical argument to prove a point.
The author of this post makes an assertion (smart people can't solve their own problems), but never proves that assertion, nor does he give any reasoned argument as to why it may be true.
A better title for the post (though the author probably likes the current link-bait title) would be:
"Why other people's problems may be easier to solve than your own"
Here what he says in the blog post, "It is one thing if they don’t have capacity to solve those problems – we are not talking about that category of people. We are talking about people who have demonstrated that they can solve those problems when they are presented by other people."
According to your title, you are trying to say that, Every person can solve every other person's problem. But not his own problem. That may not be true and that is not what author is trying to say.
He is talking about the (smart) people who can solve other's problem. But not about all the people.
Thanks for the clarification. Looking at the discussion here itself is a validation for the article at some level. It is a simple article presenting conclusions from a series of interviews with reasonably smart people.
The conclusions are being over-analyzed which is the characteristic of very smart people. HN is a community of such smart people and I am not at all surprised that it is being over-analyzed here :)
The author of this post makes an assertion (smart people can't solve their own problems), but never proves that assertion, nor does he give any reasoned argument as to why it may be true.
A better title for the post (though the author probably likes the current link-bait title) would be: