This is closer to the correct way to look at renewable harvesting, but not quite.
The problem most people seem to have with understanding the use of renewable resources is that they aren't limitless when it comes to total production. Yes, you will always have wind, but where and how much varies depending on the climate.
Germany should be a huge producer of wind power, as they have a huge source of strong wind energy, the North Sea. When it comes to coastal winds, lands along the North Sea are the best place for wind energy production, hence all the high amounts of wind energy being produced by countries in that area.
A True measure of renewable energy harvesting is only found when you compare the potential output to the actual output. When only looking at land area in square units, most of Germany isn't suitable for wind energy production. Their high production comes from intensely using the available wind 'resources' in their northern coastal regions. It would be dumb to put a ton of windmills in the Black Forests of southern Germany.