Wouldn’t say completely. The notice of intent to sell is not there to prevent CEOs from selling when they want to, it’s to notify you that they could sell this much if they wanted to.
The purpose is just to say that you need to be prepared for a potential sale. If the CEO keeps backing out of a sale, that does hurt your ability to predict when they will but not how much they could sell and therefore how much those sales could potentially affect your investment.
All of that is strategic because otherwise investors could conceivably do the opposite and sell before the CEO is forced to sell and then buy his shares at a lower price. That would mean the stock would tank every time the CEO went to sell. The problem exists because most of the solutions are even worse