Comment by GabriDaFirenze

Coaching doesn't imply superiority. Most coaching can be done with little to no context and the goal is to guide the other person in finding the right answer on their own. I think you might be confusing coaching with mentoring.

As an example, I attended a coaching training session and when we broke out in groups I played the coach role. The other individual brought up a concrete issue they were having and I was able to unblock them and I never met that person before. I was their guide even though I had no context (but I have experience mentoring and coaching).

I've been a manager for years and there's a lot outside of raw technical ability that a good coach and mentor can keep you honest on. Rarely will you find someone who's reached full potential or who doesn't want to improve at all (maybe surprisingly based on your comment but I have found seniors to be the most eager to grow)