@webshinra @CyberpunkLibrarian Ah, yes, if English is not a first language the nuances of "just" might have not been clear. In this context, "just" carries a meaning like "simply" or "merely", suggesting that the course of action suggested is a trivial thing. If asked in the right way, the question even denotes a remark about the person's intelligence.
Questions like "Have you tried...?" or "What about doing...?" or "Is ... not a solution?" or...really, many others, promote actual dialog.