They do not explore or find out clearly before deciding to join the community you call it. They are tempted by the profits that are obtained after they provide capital for trading so that when they see your active routine on this forum, it is considered useless. In cases like you describe, we can't blame them. They are just victims who don't want to learn.
I don't blame anyone for that either. Because everyone is always free to choose their own path and is always free to make and determine their plans for the future. But they also don't have to think of other people's work as trivial or useless as you say because they still don't understand how other people work in terms of making a profit.
They fall victim to scams because they don't use their brains to better research every new thing that comes their way and so easily fall into such projects.