Earlier quoted context omitted.
It seems that the synthetic stone is not the cause, but highlighting the problem: poor enforcement of safety standards and inadequate PPE provided to workers. Just because there's more silica doesn't mean that it's suddenly unsafe whereas cutting granite is safe. Even drywall or cutting concrete you're supposed to wear PPE.
> Even drywall or cutting concrete you're supposed to wear PPE Yeah, but it doesn’t kill you within a few years if you don’t, right?
You can buy a cheap yet very comfortable 5000 or 7000 series respirator from 3M for about $20 and the "pink pancake" P100 filters are another $12. If you're a hobbyist those ought to last you a year, maybe even 5 depending on what you're cutting. I do metalwork as a hobby and I can definitely feel it in my lungs (and taste it) the next day if the garage door is shut and I forgot to wear the respirator.