Facebook founder apology over ads

“The founder of social networking site Facebook Mark Zuckerberg has apologised to users for the way it launched a social advertising system.”BBC.

Seems odd that this mistake was made when surely the avowed core philosophy of a user-centric social networking site like Facebook is that it’s ‘user-driven’? I hesitate to say this but if they can make such an obvious error it doesn’t bode well in the long run.