IF I SAY SOMETHING STUPID, IT MAKES ME LOOK BAD, BUT IF A COMPANY’S CEO SAYS SOMETHING STUPID…

It’s the fault of the company’s board of directors, for not having adequate systems in place to prevent inappropriate workplace conduct?   That’s what an investor in the Papa John’s pizza enterprise said in a lawsuit claiming that because the value of their investment declined after the CEO said something stupid, the enterprise should pay them damages.  
What system would prevent the CEO from saying anything stupid?  Have someone follow the CEO around to tell him or her to shut up whenever he or she starts to say something that sounds stupid?  
I have a better idea: if the CEO is going around saying stupid stuff, the board of directors should fire that CEO and hire a smarter one.  That should improve the share price of the company, shouldn’t it?