I believe a person admitting to have an intra-personal weak spot getting in the way with them developing their inter-personal skills doesn't turn the question into an intra-personal one (off-topic) automagically.
If the question's clear and exclusive objective is, on contrast, to address their intra-personal issue, then yeah, off-topic.
As an example, a person stating they are speech impaired trying to communicate with their siblings' kids shouldn't stop us from offering strategies, because the disadvantage is context, so an answer should not focus on that, in this example, we wouldn't say "go to a specialist doctor, my brother had this trouble and had an operation and now he doesn't have this trouble", a good answer would offer inter-personal strategy to maintain a child/kid attention despite the speech disadvantage.
The confusion comes from the fact that many(most) times people are dealing with emotions (like guilt and frustration) that come from the result of their lack of skills and end up phrase things in a way that sounds off-topic like "how can I learn to speak better?" (confusing, you just said you have a speech disadvantage, we can't operate you here). They are simply showing their willingness to take responsibility and act.
I saw something similar in this question, where OP explains that he wants to ask his friends and coworkers to ignore the birthdate written on his documents because his real birthday is on October, but the person ended the text with "how can I make myself happy?"
By all the information he had provided, many helpful answers were possible and in order, but his question might still be on hold because of his phrasing considered poor quality by SE standards. The comments offered to him didn't help much in that regard. That's just one case of many similar cases I've seen, but I think there's still a solution, for example canned answers that don't sound dismissive and invite the OP to rephrase their question to focus on how their current interactions are failing and causing a problem, or even better, if you detect or have a deduction of the main interpersonal situation, ask the OP if that is in fact the main thing and suggest them to edit the text for their own interest, to avoid confusing answers full of "why you this, why not this other thing" ending on discussion.