The challenge of coaching humans.
AI doesn't need a coach. It can set an objective and then follow that objective from point A to point B.
The challenge which makes working with humans interesting is that we are emotional beings. And our emotions have a tendency to make us adapt and change our goals as we work on achieving them. Or many times, distracting us from our priorities.
We are complex beings and there are multiple layers and contexts that we are working with as we work towards our goals. The role of the coach is to understand the complexity and with empathy help the client in navigating it mindfully.