We could train our "soft" neural networks very efficiently with a computer interface. Maybe not as fast as dedicated software neural networks, but the human mind responds very quickly to feedback loops (sometimes destructively).

Which makes me wonder, what will an overtrained brain look like? What kinds of illnesses are we unleashing on the world by attaching an interface like that directly to the brain?

My pet theory is that anxiety is an over trained brain reaction.

In a lot of recovery circles there's an underlying concept of "getting out of your head" where the methodology that arises in each circle attempts to get a person to leave the circular thoughts in their heads and do/think something else.

I think this is why psylocybin is so effective for depression: it induces a state of plasticity in the brain that gives someone an opportunity to fill in the ruts they had been mentally pacing in.