Well no, unions also collectively organise to legally represent themselves to lobby and fight for better conditions at work, via legislation or judicial decisions.
Such legislation or judicial decision-making may or may not include making it illegal to do destructive bluff-calling, since an argument can be made that employers shouldn't harm the economy just because they find it offensive that people want to collectively-organise themselves in order to reduce the power imbalance inherent in an employee-employer relationship.
Such legislation or judicial decision-making may or may not include making it illegal to do destructive bluff-calling, since an argument can be made that employers shouldn't harm the economy just because they find it offensive that people want to collectively-organise themselves in order to reduce the power imbalance inherent in an employee-employer relationship.