If you read the claim they are addressing, it is specifically that > Because of the wind’s intermittency and high variability, they do next to nothing to reduc

If you read the claim they are addressing, it is specifically that > Because of the wind’s intermittency and high variability, they do next to nothing to reduce the need for other fuels. They then (correctly) point out that while wind on its own obviously doesn't work, it is still valuable as part of a grid system (with other sources of power). Note that what they say (i.e. "as with solar energy, complete reliance on wind energy would pose intermittency challenges") is not agreeing with the statement, as the statement is that it does "next to nothing" and their argument is that it does a lot, when combined with other power sources.