Earlier quoted context omitted.
Thank you for collecting this. A couple years to draft & study some proposed regulation doesn't seem that heinous to me. It would make sense to not hastily publish a regulation that will last decades without really considering it and its effects well. They can be a source of lawsuits, and I would assume, you want it to be effective which can take some study.
No, the delay was artificial. Consider the effects? How about the possibility delaying i needlessly ncreases the number of humans dying?
Since the article is referring to "83 cases among countertop workers identified across the state [of California] since 2019", it's almost certain helmets would save more lives than anything you do about engineered stone. So what's the excuse there?