Well, I have said it before so I will say it again; run your packs in full cold for a good two minutes before turning the heat up. It worked for me for 19 years.
I think to link one expert's opinion to sheep farmers to the Royal family and then to one third of the population is highly unlikely to stand up to rigorous inspection.
I really do think that we should concentrate on finding out why it is that a few of us really do react badly to fumes.
It seems to me that such cases are about as rare as peanut allergies but just as important to those that really do suffer.