We have been through this dozens and dozens of times. The topicality of this site is brutally clear. Let's take a look.
If you're not signed in and go to the front page you see this:
OK, fair enough.
Still, some people may miss that. I understand how that could happen. Next, they click "Ask a Question". What are they presented with there?
(I'll split this one up)
Great - they read again that this is for professionals and that if they're not in that category, they'll have better luck at SU.
OK, this is some advice many people would do well to take.
Ooh, this is a doozy. Lots of great information here on how a potential question asker can ask a good question.
And finally, a little causal contract with the asker:
So by the time they ask a question, they've agreed that they have read and will consider the all of the above information when formulating a question.
AND THEN THEY CONTINUE TO ASK HOW TO SAVE A FILE IN THEIR @%(@(%!$ TEXT EDITOR! (linked to a screenshot of the now-deleted question you linked to above)
That person? Their question should not get migrated. No way.
On the other hand, if an end user comes here and asks a well-formulated question, yah, it should absolutely be migrated.
I honestly don't know how we can "help amateurs get their way to SU / Unix SE" more than we already are. If they make it as far as asking an OT question here, they have already shown that they couldn't care less about the community they're asking in, the people that will be answering the question, nor the greater SE goal of building a large, well-organized database of excellent questions and excellent answers.
My suggestion were to improve mechanisms to help them to find their
way to the correct site.
What would those suggestions be?