But not everyone is a sophisticated investor and knows what he does. Is a child, following a highly admired adult into something that hurt it because it - contrary to the adult - had no realistic idea about it, is that child responsible for having being hurt?

This is a discussion board for investing. Its filled with rational discussions (mostly) held by adults, not children. It's why I come here. I don't want to be treated like a child and if I make a mistake as a grown man (or woman - there is no need for it to be a "he"), then I've had a good opportunity to learn as an adult who has to be accountable for their decisions. I absolutely can't stand the idea that good information, rationale analysis, and judgement be withheld from me because someone else feels a paternal need to look after me or other grown adults.

There are lots of reasons why Warren may not give advice that do not apply to Jim or anyone else on this board. One of them is why subject yourself to the critique of others who seem to have an axe to grind against you and constantly reference you in every single one of their posts like they obsess over you. Warren doesn't like to be critiqued and has managed to develop a glowing reputation by avoiding mistakes. But in some ways, it wouldn't make him a great participant on a stock discussion board. If we have someone willing to put out great content on which you can learn and make your own choices. Someone willing to do the work to do the things you are too lazy to do on your own. I absolutely would not want to discourage it because I want them "looking out for my best interest" as if their paternal instincts override my choices as an adult.

I would say the opposite - lets praise and encourage the behavior we would want to see. In this case, I want Jim to post more analyses and share more of his personal trades and the logic for them. I think the community would be far poorer if people spend their time trying to identify all of the places where things didn't turn out the way he thought they might (with all of the appropriate caveats he goes out of his way to provide). I would love more, not less of these ideas on the board.