My guess is that for some of them, the issue has not been that they always expected answers, but rather that they were not allowed to honestly ask.
Admittedly, questions can be used to avoid the truth. But they can also come from a searching heart. If asked with a desire to come to terms with the truth rather than to avoid it, God can fulfill the promise to give wisdom (not necessarily with a direct answer but in knowing how to handle our questions.)
We in turn can learn to hear the questions of others either with loving, respectful responses— rather than in a fearful/defensive/angry way as if there is only a place for questions that can be answered. (Sometimes trying to answer the unanswerable doesn’t help :-).
The Book of Job shows how God allows events that stir up questions we cannot answer, and then, when our questions turn to accusations against him, asks questions of us to help us trust him for what he isn’t ready to reveal (i.e Job 38:4).