Wind energy is derived from solar energy. There's no question that sunlight striking our planet is many, many times greater than our human energy requirements. But all engineering solutions require compromises among the conflicting factors, including cost.
As this article
How (Not) to Run a Modern Society on Solar and Wind Power Alone - LOW-TECH MAGAZINE points out, we'd need to build 10x more generating capacity than our actual usage to compensate for the unpredictability of solar/wind power generation. (Don't forget that too little OR too much wind shuts down mills.) The materials, including rare earths which are, well, in rare supply, to build wind generators would be a limiting factor, not to mention cost. Also, don't forget the inefficiencies of transmitting power over distances adding to costs bad enough when using power plants located near their points of usage. So much worse when the generators are out at sea.
It can be done, but should it be done?