While this arguably might be true of some sectors (like the auto industry), the same cannot be said for unions like those of service workers, teachers, and those organized by the IWW.

And this narrative of course absolves business interests of things like how they used the red scare to attack union leadership, buying themselves judicial and favorable NLRB rulings, not to mention how curbed they are in their power relative to unions in Europe by the Taft-Hartley act:

https://jacobinmag.com/2017/12/taft-hartley-unions-right-to-...