We haven’t yet figured out what it means to be conscious. I agree that a person can willingly give permission to be experimented on and even replicated. However there is probably a line where we create something conscious for the act of a few months worth of calculations.
There wouldn’t be this many sci-fi books about cloning gone wrong if we already knew all it entails. This is basically the matrix for those brainoids. We are not on the scale of whole brain reproduction but there is a reason for the ethics section on the cerebral organoid wiki page that links to further concerns in the neuro world.
Maybe I was unclear. I think ethics play a role in research always. That does not mean I want this to stop. I just think we need regulations. Computer-Brain-Interfaces and large brainoids are more than a handful of neurons on a tray. I wouldn’t call them human but we all know how fast science can get.