The fast-track system doesn't, nor does anyone else for that matter, as far as I know, make a point of frightening people regards dust mites.
If individuals take it upon themselves to do this, it is their responsibility.
The fast-track system doesn't make out that carpet is a health hazard either. Quite the opposite in fact.
Dust mites are primarily found in mattresses, then upholstered furniture, with very few by comparison in carpet. Wool carpet especially is too harsh for them, and most carpet is exposed to far too much light for their comfort. They prefer to burrow deep into darkened areas.