I can't speak to why the Public Health Agency is not updating its guidelines, because the science is there. Something as recently as this week has come out again in support of the aerosolization of COVID. I don't know why they're not; I can't speak to that.
It depends on where you are as to whether you have access to the proper protective equipment. Your safety really depends on where you live and if your employer is supplying you with the proper equipment for your own safety.