I'm not quite sure that I fully understand what is being reported here. If fine silica particles, cause silicosis, then surely working any stone containing silica will cause the same problem. I don't see what bearing the artificial nature of the stone has on the rise in illness. I would have thought it more likely that modern methods of working stone - dry rather than wet -, with routers and angle grinders might have more to do with this rise.
Artificial stone, of one form or another, has been used, , since at least the Georgian period yet we are only, now, seeing a rise in related illnesses. No doubt, the article quoted is being a bit reticent about naming the type of stone worktop that has been implicated and is using the generic label - engineered stone, possibly to avoid litigation from the biggest player in the market.
So, if it is indeed the modern type of artificial stone - the one using resin rather than cement - that is causing this rise in lung disease then would these diseases not be more like the cancers associated with something like MDF , rather than silicosis, proper?