I can't say how true it is, I know people who chuckle when I talk about how I want to do the drying in as close to total darkness as I can, and they've been doing this a loooonnnggg time. Just seems to me that if light can make so many other materials oxidize, and thus 'lose' desirable features (coloration changes, texture, often the very fabric of a thing will change with exposure).
I am fortunate in that I have a large basement area that's not enveloped like the house is, it's open to the earth and has those ventilation openings at the foundation that allow some air flow. This can be bad and good, because if RH is high then I have to move everything inside, where it's *too* dry. But, whether I use a spare bedroom or the basement, I like to make sure that my plants are in the dark, and the only reason resembling a good reason that I can give you is that I am anal that way, for the reasons above.
Oh yeah, you can either baffle that passive intake, or get a photog's vent... thing, of course I can't remember what they're called, but they're for a darkroom. Brainfartage, sorry.