Windmills ?

I really don't get the point of windmills. They provide a into boost for production, which is nice, but not that great - especially as it doesn't count towards units or wonders, so doesn't even help in my production heavy cities. Also factories come soon after and are much better, and in my economic/science cities there are just many buildings that I would priorities over them. Am I the only?

Personally I'd like to see them come slightly earlier, printing press or so, and provide some food rather than production as there is a lack of food buildings between aqueducts and hospitals. Keep the engineer though, there are few enough of them.