I think that this is about quality rather than etiquette.
From @Oded's answer to What are limitations on self-answered questions?:
The limitations on self-answered questions are the same limitations we
put on questions and answers that are not self-answered.
The question needs to be on-topic, of high quality (well, certainly
not low quality) and as much as possible, not a duplicate of an
existing question and yes - narrow and specific, just like any other
If I saw a question, irrespective of whether it were "teeing up" a self-answer, that was of the form:
I know that many people have opinions about how to do X but nobody
explains it clearly. Please share a detailed step by step guide to do
I would downvote it because it asks for a step by step guide for how to do something rather than stating what you are trying to do, what you have tried and where you are stuck. In other words the question does not demonstrate research effort.
If you believe that "many people have opinions about how to do X" then I think you should link to at least some of those opinions as part of your question.
I think the question would be better asked using a form like:
I would like to do X which involves a series of steps.
I have researched how others have tried doing this at link 1, link
2 and link 3. However, I am still stuck when I try to do step Y
because I (get an error | get an unexpected result | etc).
How can I do step Y?