Myelinated neurons send messages 3000x faster!
Think of unmyelinated neurons like dirt roads, and myelinated ones like paved highways:
Cars can travel on both… but they go much faster on a smooth highway than a bumpy dirt road.
Likewise, in a race between myelinated + unmyelinated neurons, the action potential will zip down the myelinated path much faster.

Because myelinated parts of the brain send + receive signals more efficiently, they dominate decision making.