The mega's doing what Apple and Google were doing. Both companies had an agreement not to hire the others employees to keep wages and costs down. This is the reason non-compete clauses in California have been ruled invalid by the courts. Until someone who has had it happen in trucking hires a lawyer and fights it, the companies will continue to do it, and the mega's know it. https://www.cnet.com/news/apple-google-offer-415-million-to-settle-poaching-lawsuit/
I also work for CRST. The Ninth Circuit Court agrees with them. CRST Van Expedited, Inc. v. Werner Enterprises, Inc.
And how many lawsuits has CRST filed since this one 2005ish? You might also read the facts of the case you cited. They sued Werner because Werner was engaging in some targeted poaching of drivers in large numbers. That case was about a repeated pattern and practice. CRST is not going to sue over one driver going to another company.