No this is not true. There is literally physical space between dendrites and neurons where chemicals called neurotransmitters are released then receptors pick

No this is not true. There is literally physical space between dendrites and neurons where chemicals called neurotransmitters are released then receptors pick up the chemicals. So the pathway through the brain is not purely electrical. That being said I agree with your overall point as it’s just signals and systems and how the mechanism works is irrelevant to the fact that everything can be modelled by a neuron.