I've played against dan players who describe this decision (tenuki, like the tenuki suit in mario, or "to deceptively play elsewhere") as mainly an intuition ab

I've played against dan players who describe this decision (tenuki, like the tenuki suit in mario, or "to deceptively play elsewhere") as mainly an intuition about "balance" which they somewhat vaguely describe as deciding that although the shape may not be good, the context of the shape is balanced, so it is OK to leave it be. According to Michael Redmond's commentary during the alphago matches (paraphrasing) often times the ability to calculate value is one of the last skills professionals actually master, far behind the concepts of shape and balance, and even among them some rely more on that skill than others. Lee Sedol, as an example, is relatively weak in this regard, Lee Chang-ho, on the other hand, seemed to be a prodigy just at this skill alone, allowing him to play a style which otherwise most observers called 'rigid'. So it is in fact common to find relatively high level amateur players who aren't good at calculating value.