Although we have machines that now cut and bind books, the best book binding (and most aesthetic) are done by hand by enthusiasts on, e.g., Reddit. Moreover, such book binders don't feel threatened by machines, I would think, like how people who do DIY do it because they like it, rather than because they have to do it.

Even if an AI can write an essay, that would not stop me from writing. Essays have another important dimension, which is that of creativity and the message. I think the only real relevance is in the context of school work, outside of that I don't think the AI's ability is that important. People are intelligent already, and competition between writers or the general tendency to influence each other sometimes is even a good thing.

I think you're right - an essay should communicate a key thought, broken down in logical steps, coherently tied together. This is important for a whole host of skills.

Is it possible you have cause and effect reversed? I received this as "learning to code well can also teach good communication skills"