I suppose a good bit of this hinges on how involved the CEO chooses to be. Eisner was notoriously a micro-manager, so he probably deserved a lot of the blame.
I don't think for a minute that Kevin Feige ever went out of his way to consult Bob Iger on She-Hulk. I'm not sure the showrunner even consulted Feige on She-Hulk, other than
the silly finale scene!
Point is, while the buck stops with the CEO, the management (or mismanagement) of IP isn't usually the direct fault of the CEO. We like to scapegoat Iger for things that might better be pinned on department heads, WDI, park ops, producers, legal departments, etc.