You’ll outgrow some goals. That’s not quitting, it’s updating.

A goal was set by an earlier version of you who had less information. When you no longer want it, that is often because you have learned something since, about the work or about yourself, and refusing to update would mean honouring a decision made by somebody who knew less than you do. Quitting and outgrowing look identical from outside, so only you can tell them apart. The difference is whether you are escaping difficulty or changing direction.

Ask one question honestly: would I still want this if it suddenly got easy. If yes, it is the difficulty talking, so stay. If no, let it go without needing a story.