>People don't join unions if they are going to be worse off materially.
Of course they do. The difference is that they are tricked into thinking they won't be worse off by the union organizers pretending that it's unlikely everyone will completely lose their job.
So the logic goes, don't join a union or you'll lose you job?
How does that not sound coercive? A company saying "If you collectively bargain against us, we will punish you" sounds ok to you? You've been tricked out of collective bargaining by decades of anti-union propaganda, and now you're carrying water for capital.