You do get that both NDAs and Non Competes where born during the age when unions were at their most powerful. They didn't oppose them, they supported them.

The unions don't want people to have freedom of employment, them controlling labor is how they derived power.

you ever work in a union run place, jobs are siloed and controlled. Have a natural talent and want to switch jobs, regardless of how qualified you are, if you don't have seniority or aren't a favored son, you are getting the job.

People and their blind belief in unions seem to not study their history, they like any large institution will be abused and uses individuals to their own ends.