Sometimes people want to be generally helped, and sometimes people just want an answer to their question. If the answer is “it’s impossible” then that’s a valid answer, but if the answer is “I’m not going to tell you, instead I’m going to assume that what you actually want is me to teach you why you were wrong to ask the question in the first place” then theres a good chance that actually they just wanted an answer, and you deciding for them what they need comes across as patronising.