Probably not the author's point but to me, the takeaway is that these people are driven by emotion and can't be won over with rational arguments. They have an emotional attachment to their old ways, a fear of being obsoleted, a wish that there is something truly special and mysterious about humans, etc.

And the other side is convinced that there’s nothing truly special and mysterious about humans, which feels inherently disturbing. Like, these people would swap their brains with a computer in a hot second if they thought it would make them do X a little better. Shudder.