Wind is only useful up to a point, once it gets above 20% of generation capacity ensuing grid stability becomes expensive either through huge price swings or grid level energy storage.
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From the IEA report: "Substantiated by in-depth case studies, this report infers that, almost anywhere on the planet, nearly 100% VRE power grids firmly supplying clean power and meeting demand 24/365 are not only possible but would be economically viable, provided that VRE resources are optimally transformed from unconstrained run-of-the weather generation into firm generation."[1]
However, propagandists routinely spread misinformation on firming. For example, they might cite the absolutely absurd LFSCOE which is funded by the energy sector's equivalent of the Center for Indoor Air Research[2][3][4].
[1] https://iea-pvps.org/key-topics/firm-power-generation/
[2] https://en.wikipedia.org/wiki/Cost_of_electricity_by_source#...
[3] https://www.desmog.com/2016/01/10/rice-university-s-baker-in...
[4] https://en.wikipedia.org/wiki/Center_for_Indoor_Air_Research