Obviously, you heard this somewhere but have not bothered to research the actual problems.
Why the hostility? It think it has been pretty well established that electricity generating windmills are horrendously unreliable, an actual drag on any power grid they are attached to when working as advertised, and pretty much a big fat joke on tax payers and consumers. Do you really think citing a heavily footnoted academic journal articles is necessary when mentioning the obvious fact that the things just can't take the stress and rarely function?