You're technically right that wind is an indirect form of solar energy. You're not right that this would imply that solar is any "better". The wind will blow w

You're technically right that wind is an indirect form of solar energy. You're not right that this would imply that solar is any "better". The wind will blow whether you use its energy or not. You're not "more efficient" if you use solar instead of wind. You're just making use of energy at another place in the system where it would otherwise go unused. More generally on the Wind/Solar question: They complement each other quite well. Most of the time when there's a lot of sun there isn't a lot of wind and vice versa. Therefore building up both reduces your needs for flexibility and storage compared to only using one. Also of course there's a bit of location dependance, there are places where wind works better and places where solar works better (sunny). But still in almost all places you can use both, but you probably want a different mixture depending on the location.