We can read thick reports but there is only one metric that counts for anything. A typical wind energy contraption never produces the energy that was required to build it in the first place. This means that if we used that same energy to produce the windmill, gave it to those that must endure this flicker power on-off rubbish, the world would be better off and the customers as well. Everyone wins from not building windmills and solar panels. Except for the promoters of such contraptions of course.
Building and erecting wind turbines requires hundreds of tons of materials — steel, concrete, fiberglass, copper, and more exotic stuff like neodymium and dysprosium used in permanent magnets.