Around 10-20 people per year are diagnosed with asbestos-related diseases in HK, and I expect that most of them will relate to the brown and blue asbestos that has been banned for about 25 years, but which still exists in significant quantities in old-buildings and to which demolition workers can be exposed if proper care is not taken.
On the scale of things to worry about, white asbestos in small sealed gaskets which will only pose any risk at all to motor mechanics who handle them incorrectly is, rightly, way down the list or priorities compared to things like road safety, air pollution, bad diets, lack of exercise and a load of other things that governments should spend more time worrying about.