Beauty is one of the most subjective concepts a human can reason about. Who are you to tell anyone what is beautiful? Just because a bunch of techies here on HN find beauty in the engineering of a windmill, it doesn't mean everyone has to like them.

I don't dislike the design of wind farms, but sure as hell I'd prefer landscape unspoiled by a forest of big white rotating blades. Given the choice, I'd prefer a concentrated energy generator (whatever that might be), that can be hidden away. So in some sense, I do believe they are a blight on the landscape.