The point is that what works for you might not work for everybody else. My own situation is such that I can not do anything about cat hair and dust in the air; the house we live in is too small to claim an individual room as darkroom, so I'm confined to using a section of an unfinished basement in a 100 year old house, which I share with three cats, storage shelves, laundry machine and drier, furnace, water heater, and a big dehumidifier. When I do as you suggest, I end up with dust all over the film.
The point of my long explanation of what I do has to do with debunking the common thought that 'absolutely nothing' can touch the emulsion when finishing up. I am living proof that it works very well, if done with great care.