If everything has a purpose then evil doesn't exist

[Anomalocaris]

Not to mention that plants DO breathe, which is what I think Anomalocaris was getting at. All the land-based plants that weren't washed away would have drowned.

did Noah know that plants breathed? did God send any plants to Noah one male one female? Did god have plants march onto the ark? As breathing was only one requirement of getting on the ark.

Noah didn;t know and god didn’t know,

 But that’s because both Noah was the figment of the imagination of people who concocted the flood story probably during the late Stone Age,  whose tale was then stolen by ignorant Bronze Age hucksters who made up this Yahweh character , so neither yehweh nor Noah would have known what people who were probably ignorant even by the standards of the Bronze Age happen to not know.