As this might not be a rules question, I apologize in advance.
As I understand the rules, followers can be placed on tower tiles. I can imagine strategies where it could be beneficial to risk capture when the followers might either reserve the feature (farm, city or road) or reinforce your possession of it.
However, one of the ffff tower tiles has a cloister on it.
Now I could choose to place a follower on it; but as I see it, this follower could be captured at any time prior to completing the cloister, this could take a while; so there seems to be very little (no) incentive to claim the cloister unless 1) you complete the cloister as you place the tile or 2) you desperately want other players to waste tower pieces.
My question: have I missed something or is the cloister merely a distraction?