Let me guess, it's because they are newbies?

That's the reason

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Newbies are the ones who fall easily to these scams. Correct me but there are newbies out there that are very greedy that they don't have time to do some research and what they will do is to just throw their money and if they see that they can earn high profits on particular project, they will risk money into it and not thinking of the possible red flags.
Aside from newbies, ignorant investors are the ones who are falling to scams easily. What do I mean by ignorant investors? They are the ones who are just ignoring the advices of other people. These are people who don't care about what happen to them but they will just invest into projects they believe they will get high profit. Ignorant and newbie investors are the same - same that they are the ones who are falling into scams easily

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Well, these ignorant and newbie investors will not learn if they will not experience it so sometimes, experiencing getting scammed even once would be beneficial to the investor. What's wrong is that they already got scammed once and after that, they got scammed again like they didn't learn to their past experience.