> Is being bigger Platonically better than being smaller?
Maybe, most animals evolve towards larger sizes. Except on smallish islands, where they tend to become smaller.
> Maybe, most animals evolve towards larger sizes.
This is not even a little bit true.
> Maybe, most animals evolve towards larger sizes.
Animals tend towards whatever size lets them maximise survival. This is based on available niches and other selective pressures.
> Except on smallish islands, where they tend to become smaller.
Island syndrome leads to both gigantism and dwarfism.