Its much simpler than that. Decision making at a big company is layered. Anti-trust considerations is about as C-suite a concern as I can possibly think about. Operational leadership even VP is singing for their supper on a project by project basis (to gain status and move up the company ladder). So you get these things.
It's almost certainly a reflection of a culture who's motto was/maybe still is "move fast and break stuff." I think the idea of existential consequences for actions is relatively new one for FB (and to a lesser extent Google) and your seeing a company not move fast enough and a CEO who is probably a little bit underarmed when it comes to really understanding the stakes of certain types of public perception.
It's almost certainly a reflection of a culture who's motto was/maybe still is "move fast and break stuff." I think the idea of existential consequences for actions is relatively new one for FB (and to a lesser extent Google) and your seeing a company not move fast enough and a CEO who is probably a little bit underarmed when it comes to really understanding the stakes of certain types of public perception.