AJB Temple - I think it's unfair to say my argument is flawed, not least given I made very clear hobbyist users were free to decide for themselves whether to overlook HSE guidance (i.e. employers not having the same freedom).
That aside, what you are saying about the wider extraction/RPE topic...
You have answered your own question; see attached HSE regulations for wood dust. This very clearly states work with hardwood requires APF20, as does emptying a dust bag (an image Axminster was using to market the product until this morning, when it was removed). APF20 is TH2P while, as you say...