New player here, so apologies for what is probably a daft question.
Why bother with the political action: prepare an event, other than it gives you one off culture equal to age of the card - what are the other reasons for doing this? It leads to a face down event card being played, which may or may not benefit you more than the other players from what I can tell.
Knowledge is power. That's why you want to know the events to come. And that's why you want to seed them in the first place. The points are just a marginal benefit.