If you look around, you’ll see that all life is steadily dying off. Earth is headed for the judgment.
Many species were wiped out during the Genesis judgment; the majority of them being (unsurprisingly) marine life. That is what a massive eruption of super heated water and lava from below the Earth’s crust (the “fountains of the great deep”) will tend to do.
So according to the hypothesis, in the judgment, God killed off something like 99.9% of the animals he made. And it is only the ones who made it into the ark that survived. The same goes for plant life too. Presumably all of the land vegetation that survives today was saved by Noah in the ark? Would you say this is accurate?
Wouldn’t all the seeds that floated be roasted to death by the superheated water and lava?