True, but that argument is pretty m00t considering that the idea should be to have as much freedom as is technically achieveable.
I'm rushing through this gameplay right now and want to significantly reduce the time the goblin camp encounter will take me.
Joke aside, I think it comes down to the fact the wyvern poison is for coating weapons and not for drinking. And so the game doesn't allow you to do it because it doesn't work with this type of poison. You have to use poison which specifically is inside some recipient you can drink.
And it's not illogical either. There are some poisons in our world which would do nothing to you if ingested but would kill you if it goes to your blood stream.
