Wait. So what if you ate the snake… wouldn’t that mean at that point it could be poisonous? Checkmate.
If you consume venom and don't have any open sores, you should be fine in most cases.
Poison, however, will probably still kill you if you inject it into your bloodstream. Then again, most things will kill you if you inject it into your bloodstream.
Venom is transported through the fangs just so a bunch of children don't go eating a bunch of venom glands...
If you eat a fang and it gouges into your skin and injects venom, did you eat it or did you get bitten?
It's not the fang that's poisonous but the glands and those absolutely could be even accidentally eaten. #debunked
So the conclusion is venomous is a subset of poisonous and the movie totally watchable.