That's a great point. While not the same, I think this relates to the bullshit assymetry principle (aka. Brandolini's law), where as a result of the time it takes to respond to basic repetitive questions, especially those which are pretty easy to search around for existing answers, then entire communities can get tired of tolerating them. In some cases people just become rude and dismissive and in other cases staff actually just ban the person asking the question, which is already the case in some Lemmy instances.

One potential way around it I've seen is having a decent FAQ available and well-known within the community, so one literally just reply with little more than a link to a page with the answer already written. In fact, one site used to (not anymore) have a culture where people would just attach a whole book as a PDF and simply reply 'read this', maybe listing a chapter if you're lucky, which isn't very tactful but it's pretty funny and still provides a low-effort, high-detail answer (albeit maybe too high-detail for the kind of person who asks such a common question to reddit instead of trying to find the answer themselves).

If we consider that phenomenon you described to be a problem, the solution is being able to make it extremely quick and easy to give a canned response and politely tell them to RTFM.