We're finding through LLM research that smaller models aren't necessarily dumber, so much as their intelligence is more limited in terms of domains and knowledge encoding ability. Those small brains might have limited knowledge encoding ability, but that doesn't mean they can't reason about the things they have encoded.
What does size have to do with anything? We should not assume that the human brain size to brain capability ratio is the highest in nature, or even that it’s in the top half of all creatures.
Humans are just arrogant and overconfident. We’re an incredibly flawed species and we’ve created incredibly flawed societies.