If everything has a purpose then evil doesn't exist

[Mister Agenda]

It's also a requirement for surviving a devasting global flood. All that pretzel logic to explain how the animals survived, but you're still left with 'God magicked it that way' to explain the survival of the land plants.

common man... Seriously? Do you not know how SEEDS work? whether stored away on the ark or left out in the wild, once the water receded that would have simply germinated. 

Also you do get that God is actually the one making all of this work right? The Flood narrative is not meant to be received as a logistical tale of how one man and his family saved the world from an angry God, but rather how god used one man's faith to save the world and all the living creatures in it from an evil this world has not seen since.

Some things (not necessarily this in particular) just need to be left to God. As with all things there is alway a balance to be found

More ad hoc additons to your story and you talk like I'm an idiot for not knowing what you're going to add next? You're the one treating it like a logistical problem with all your trying to make it add up to natural explanations. It's a story about the wages of sin and the limits of God's patience; but you're bound and determined to have it make logical sense too.

I'm going to try to predict the next twist in your story (it stopped being the story in the Bible long ago): How did the seeds arrive from all over the world? The animals picked them up on their way to the ark, and dropped them back off when they went home through the barren washed out landscape (some of them walking or flying thousands of miles) with nothing growing on it without eating them, or each other.

On the 'out in the wild' thing, I have no idea how to approach a farmer who thinks you can soak the seeds in land plants in salt water AND subject them to the pressure of being miles underwater, and expect them to germinate.