Again I assert the brain is much more complex than what happens in terms of how it is synaptically connected up.
And again I ask: is that vital to connotative thought? If hormones are really only good for say emotion, then fuck that! I don't want emotional machines, you probably don't either! Is emotion important to general intelligence? probable not, digital machines have been programmed that can solve many specific problems, uprating that to general problems is not likely depend on emotion either. Back to connotative thought: is that dependent on emotion? Even catatonics claimed to have had some consciousness when frozen, and that about as devoid of emotion as you can get, lacking the desire even to move! A SAI may have desires though, hopefully ones we specifically program it with, like the desire to please humans and obey, might translate that as "emotion".
One might summarize this point by saying:
“Neuromophic computers are consistent in response to a fixed set of stimuli, hormone driven humans are not.”
Neuromorphic chips being analogy are likely to be inconsistent, they are "fuzzy" logically, and if we wanted to modify their pattern like a hormone would in humans we certainly could implement that in hardware with ease. Although why anyone would want to program PMS into a machine is beyond me!