Data was often played "dumb," especially when it came to The Moral of Tonight's Episode, where they focused on him, usually. Data would be used to explain it to us kiddies through conversations with Picard, usually, but not always. "Captain?" "Yes, Data." "I do not understand. The aliens knew the facts and yet they were stubborn. Why would a people behave in this manner?" I mean ... sometimes it was OK, depending on how it was written, usually. Like Tasha's death. Data was used to voice what the crew were feeling about it, after the funeral and it was a nice closure.
But having it come from Data, either way, was sometimes hard because he should've been a quick study on certain Human behaviors, but because those running the show found it useful, or amusing, or whatever, they give him a brain the size of a planet and yet he's too stupid to imitate a sneeze after 7 years, already. I liked Data, when he was serious, or when he was at his job, usually. His extracurricular studies into and observations of Humanity were just hard to take, sometimes.