From the story: Business groups opposed to the rule, such as the U.S. Chamber of Commerce, have said that the contracts are necessary to protect proprietary information and training, and justify investing in workers who might otherwise immediately jump to a competitor.
No employer in any field I've applied in since around 2006 has wanted to do any training beyond operating requisite proprietary vendor software. The expectation is that you're fully educated in all other skills that might ever be needed, preferably having worked in Rust for 63 years and internal-combustion-engine design since the Late Bronze Age Collapse.
Proprietary info has always been need-to-know and, where possible, distributed such that no one below the C-suite knows how all the parts interact, even as those same leaders have no functional understanding of how the parts actually act.
All noncompetes do is drive down wages.