I think part of the problem is that we non-organized workers (i.e. most tech workers and our similar peers) have accepted the unfortunate media-fueled trope that collective worker action equates to organized-crime connected unions like those of the Hoffa-period Teamsters.
Unfortunately, many white collar workers also don't want to be associated with the image of people in hard hats, even though their power relationship with their employers is not that different from those of blue collar workers. Acknowledging this would mean acknowledging the existence structural impediments to their career advancement that make the chances of their entering the C-suite very low, and that's a bitter pill to swallow.
The vast majority of worker unions (nurses, teachers, international brotherhood of X, etc, etc) are completely above-board organizations.
Also, this outcome demonstrates that there are many forms of collective action that are not full unions. The degree of organization needed depends on the circumstances (The early strong manufacturing labor unions emerged partially as a result of violent repression of worker protests by companies).
One could even argue that the anti-poaching class-action lawsuit against large SV companies many years ago was itself a form of collective action.