No, it's called functionalism. To me, it's actually the opposite, assuming there is a fundamental difference between simulated neurons and real ones seems almost religious.
While it's true that we aren't there yet, and simulated neurons are currently quite different from real ones (so I agree there is a big difference at the moment), it's unclear why you presumably think it will always stay that way.
If you actually have a way to fully, without reductions, simulate matter, that's probably a Nobel prize coming your way.
The common scientific understanding is that this is not possible, at least not without extreme amounts of energy and time.
The dimensionality, or complexity if you'd prefer, of your logic gates is quite different from the cosmos. You might not agree but in my parlance a linear and a fractal curve are fundamentally different, and you can try to use linear curves to approximate the latter at some level of perspective if you want but I don't think you'll get a large audience claiming that there is no difference.
As far as I know we've also kind of given up on simulating neurons and settled for growing and poking real ones instead, but you might have some recent examples to the contrary?