I hear you, but in terms of what we're talking about the thing to remember is that (1) very few people really go to the actual trouble of unsubscribing (versus simply ignoring) and (2) every post that comes out is another chance to find new subscribers. And by the numbers the new subs you get from (2) are always more numerous than the churn you create from (1)!

Of course, the unspoken assumption of this entire post is that a newsletter writer wants to create a growing, remunerative business -- if your goal is to create a good publication that you feel proud of, it seems like this calculus might end up in another place.