There's this trend of saying that our feelings are "nothing but hormones". Or that our vision is "nothing but receptors in our eyes". That our organs are "nothing but servants of our brain". And more disparagement like that, I think it's called biological reductionism.

It's the same in physics, where the trend was "we're nothing but our atoms" and now they've married and it's "we're just our genes". And so on.

All these things mentioned we cannot perceive with our senses. Therefore, we have invented extensions, "enhancements" of our extremities and sensory organs that allow us to see, hear, taste, touch and move around "better". Only I wouldn't describe it as "better" at all, but "different". The devices also do not "replace" sensory organs, but complement them. They are in no way "superior".

The folly of equating metaphors with our rather extensive powers of observation and experience in the real world and pretending that this is "the same as that" or even "better" is rampant. In this way, we also confuse mathematical models and computer-generated scenarios with reality, and this is probably the illusion that we also recognise at the same time.

The confusion which is caused by the urgent attempts to "unite us", or to find an "all unifying theory" neglects what you said about diversity, variety, differences so great. The unity IS the differences, if you like. Unity is not "all things are the same, all humans think the same, all living things are the same (DNA-wise)", Unity is one AND the other. Sameness and differences "(all) at once". Now is it not funny that we place contradictory terms right next to each other, which shows that language itself has long "understood" this.

I would like to object to what you said about perceptions and those leading to the illusions. I would say, we perceive things right, we are very good at that but what we make out of them in our thoughts, in our realm of thinking and interpreting, is what causes illusions. The human ability to filter and see what he needs to see in his very environment is great. But it's a lack of self trust and over- as well as underestimation of ones abilities and what one ascribes to other peoples abilities; expressing in distrust.