If you went out on the street and asked random people to name CEOs of nestle or shell I'd guess you'd have a super majority who don't know.

There's a reason most CEOs stay quiet, when you become the face of a company your actions reflect on the companies you represent, and when you spend billions of dollars to make sure that your antics are broadcast as far and wide as possible it's not surprising that your antics affect your companies.

There's a reason most spokespeople for companies have to sign some level of acceptable public behavior contract.