Intelligence seems to have evolved three times on this planet - mammals, corvids, and octopuses. Octopuses have a distributed system rather than one central brain. They all have neurons, but the higher level architecture differs drastically.
Knowing that several different architectures can work is important for AI. There's apparently more than one way to do it.
[1] https://www.sciencedirect.com/science/article/abs/pii/S23521...