Sometimes it is hard to make a decision in general. Some people have a difficult time just simply trying to choose something. Like my sister for example. My sister, I find, is the worst at making decisions. Mainly because she can’t. She’ll stall for long enough until someone else has made the decision for her or until she finally blurts out an answer and lives with her choice.
Maybe the quote means that people run through an already set list of things that bother them and they are asked a question during an inappropriate time. If stuttering is something that bothers someone, it would be an inappropriate time to be asked what you think of the stuttering person’s speech.
Though, the meaning of anything taken out of context can changed. What a sentence taken from a book can mean one thing, but when that sentence is taken out of the book and placed on its own the meaning changes as well.