I almost failed Computer Architecture class back in the day so I might be off base here, but I understand most transistors to be organized into discrete functio

I almost failed Computer Architecture class back in the day so I might be off base here, but I understand most transistors to be organized into discrete functional units - this part forms a register, this part a control layer, this part an adder, and so on. These units are organized hierarchically of course, but the whole system is based around the neat compartmentalization of transistors based on function. I’m not a betting man, but if I were, I would put all my chips on that not being the case for the brain. Thus, my complaint of trying the (IMO) lazy approach of “the smallest unit of the computer — the transistor - will be equivalent to the smallest unit of the brain - the neuron”.