I was thinking along the same lines as Pete. I can't remember if I actually created a post about it when the news was first announced, but I think it will come as a surprise to most people that it was only in the past year IIRC that the FDA approved the first respirator (aka face mask) for pandemic flu for use by the general public. The N95/N99/N100 masks that many of us stocked up on during the SARS or avian flu scare days are all meant to be worn by health care workers (or in a "work" setting). As Pete points out, there are various in-house, OSHA and other agency rules about facial hair, training, fit testing, periodic review, etc. Really, personal protection is generally not just about the equipment itself. There's a whole system around it.
A single use smoke hood would need to be tested against various size heads, with long hair, beards to make sure that they provide protection without any formal fit testing. The packaging and instructions generally is also scrutinized to make sure that normal people can understand them without a trainer around to explain their proper use. You can sell smoke hoods to the general public, but there's gotta be liability issues to marketing protective gear to the general public versus for occupational use that we don't realize.
I'm still surprised that the US does not yet have a smoke hood certification standard like many other countries. Well, actually, maybe not so surprised. I suppose once you have a standard in place that certifies that the smoke hoods work, companies worry that the gov't will require them to spend money to make them available in buildings, on ships, airlines, etc.