Bird Box - Can people eat cork?

I just finished watching the movie "Bird Box", so I guess I should write something. Although I know it's not related, specially because of these creatures/monsters, it reminded me a little bit of "Ensaio sobre a cegueira" ("Blindness") by José Saramago - basically because they have to adapt to "being" blind, nothing else.

By the end I felt that a few things where left a bit too unexplained, like why do some people look at these "creatures" and commit suicide and why others do not, instead aiming to find people that use blinds and force them to look. But that's ok, i guess it leaves some mystery in the air. So these creatures don't prey on blind people, that's why everyone ended up gathering at a school for blind people... so many people there, blind people, people that can see, dogs, a lot of kids... finally they are all safe from those nasty creatures. That is until those other kind of people (the "evil ones" that make others see the "evil creatures") find them and make them "see"... well the blind people can't see so i guess they'll just use some bullets on those. AH! But that school for blind people is in the middle of the woods, so maybe the "bad people" will never find them. Oh... they are in the middle of the woods, for 5 years, with a ton of people and even pets... *flashback to the first half of the film: Basically they had trouble finding food for a handful of people* I don't think that it's possible to farm in a forest, I saw (yes... yes... I took my blindfold off, sorry mom) no farms while Sandra Malorie was trying to find the kids in the woods, and I doubt that they can have an indoor farm that would produce food for all those humans... and pets (I think I saw a dog multiple dogs... humans can be vegetarians, but those dogs need meat). Considering that the dogs are just there for the scenery (probably to give the sensation of a more homely comfort to the viewer), there's a lot of people on that place and (unless Malorie arrived there right on time for everyone's tea break) no one seemed to be actually working... can people eat cork? I hope they can, otherwise I'm already waiting for the sequel where Malorie has to run away with the kids (with the blinds again of course, otherwise where's the fun?), because everyday someone goes missing, and dinner is always meat...

So... I'm starting to nitpick a lot and the world-building bug is starting to make me itch, so I'm just going to stop for now before I ruin the movie for myself. ¯\_(ツ)_/¯