Thinking back to my earliest days in subjects like Excel, Access, and VBA generally .... which admittedly was mostly on Utter Access (but I think my experience would probably hold true despite which forum), some of the posts which deepened my knowledge the most were the threads where seasoned developers posted mild disagreements or varying (or even conflicting) viewpoints on things during threads. Some people see this as going off the rails, but I didn't....I saw it as a whole bunch of extra knowledge for me, at no cost (it didn't really "cost" me any angst to read through the comments, but then again, I am a fast reader). By far the threads that taught me the least were the ones where my question was answered most directly and with a single comment. It was instant gratification, but not really quite as valuable (if I were to be so bold as to compare them) as the ones where seasoned developers actually demonstrated many viewpoints even to the point of disagreement--that
REALLY broadened my horizons and gave me the deepest knowledge. I remember posting things about a datatype once and got 3 pages of responses where people argued about datatypes, memory, optimization, how vba processes things behind the scenes, and who knows--probably the invariable 1 page response from Albert K too. For me those were the most valuable takeaways of my "forum experience".
However, I know some posters are not looking for that, they just want their most immediate problem solved and to walk away. But generally as they mature as developers, they learn to appreciate the deeper knowledge that comes from more in depth discussion. I.E., on Stackoverflow I learn more from the "dissent" [comments] than the "opinion of the court" [upvoted answer].
To answer your actual question, Jon, I think people's need for hand holding is adequately met by the occasional comments they'll get anyway, like "I suggest you post this thread in such-and-such forum rather than introduction", or, "I suggest you ask this question on something other than a profile post", or various pieces of advice like that. I think the mentoring might be overkill but that's just me and I'm new here so don't listen to me ha ha