This actually reminded me of the comment a newbie made earlier last year regarding something like this too. The newbie said that he was recommended to the forum by a friend who told him he could make money from the forum. I can't remember the username of that member; otherwise, I would have checked on him or her to see if their intention of joining the forum was finally archived or not.
Can we blame the newbies in such cases? I don't think so, because as you said, the newbie who's message you encountered said he was referred by a friend who said he can earn money from the forum, and I don't think anyone wouldn't take interest in something that they know has a possibility of providing them with some money.
It's the people to be blamed who invite others on this forum by giving them the impression that they can earn money from here instead of telling them that they can learn a lot of things about the cryptocurrency industry from here which would either make them interested and then they would join with a different mindset or they will simply stay away from the forum, in both cases, it's better for the forum as a whole.