Exactly, this is a logical move to rebalance his net worth outside of Intel. Otherwise he's got a whole lot of eggs (including his career) in one basket.
Different investors have different risk appetites.
If in your mind, the CEO sells one share of the company's stock and all of the investors should sell that stock, I think it would be a fantastic time to buy into the stock.
And while the technical issue discussed elsewhere may play a role in people's minds, keep in mind that if it's only the CEO dumping stock he might be cashing out ahead of a #metoo