Great summary video from Lawful Masses YouTube channel. Attorney reads through the letter from the General Counsel of the US National Labor Relations Board regarding non-competes.
TL;DR
The majority of non-compete agreements likely violate provisions in the National Labor Relations Act because they reasonably create chilling effects that prevent workers from organizing, threatening to quit to improve workplace conditions, and carrying out those threats. Non-competes also causes missed opportunities for workers to improve pay, regardless of whether the agreement is enforced.