That's not really true, it is so in an individually imperceptible way but its there. If he then after stock plummeted 10% went back and bought back shares and kept the 10% as a profit, where did that money come from? It has to come from someone elses pocket, it was created out of thin air. Its just impossible to return that money to who it belongs to, because it belongs to everyone that traded the stock in a certain interim.
This is all related to information disclosure, which sometimes is necessary and sometimes isn't. A guy selling stock is a poor proxy to a disclosure of a security issue like this. I think intel is more responsible for untimely disclosure than the CEO for untimely selling.