"Really" in this context means that an answer has already been provided by someone but you object to the rationale given for this provided answer, particularly because it's too shallow. In other words, it's not a description of the problem the question asks you to solve, it's a description of the context in which the problem is to be solved. So the fact that it can be done with any sentence doesn't mean that it provides no information, just like "Like I was discussing with Joe last week, is the sunk cost fallacy a fallacy?" doesn't provide no information.