All iconic centralized systems have points of failure. Why do many people feel insecure or powerless by facebook ? It was iconic in its time ! PS : I am not of

All iconic centralized systems have points of failure. Why do many people feel insecure or powerless by facebook ? It was iconic in its time ! PS : I am not of any extreme opinion that everything should be decentralized. This post was just a thought and so decided to post here.