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?
I'm not saying that we need more delays. I'm also not saying that there isn't room for more regulation here, but just slapping any poorly considered regulation down may not solve the problem.