We do not know what we do not know.
So we can know our goals but not precisely how to get there (quite clearly we are not yet there),
for that we need to learn. And to learn is easier if we get coachable.
Being coachable is a smart move, and can be crucial if you have some motor control failures, some dysfunctions.
Dysfunctions even if born from some physical event present a stubborn certitude in the order, an order that being coachable can smoothen enough to change into a functional one.
Being coachable means that you can learn from every thing useful crossing your life, and especially you can learn what you do not know you need to know (that is the centre of knowledge, to know what you do not know not to know).