That's the worst situation, but usually, scammers use the lack of knowledge as a way to promote their "guidelines" or "guidance", and then people get rugged.
The first rule is to do things yourself, you will be right or wrong, but it will be you, not somebody else.
Sometimes, people with good knowledge also fall for scams. Scammers are always inventing new methods, and some of them actually work. Even people who have been crypto space for a long time fall for these traps. I was scammed a few months ago even though I thought I would never fall for scams. I was scrolling social media at late night and I received a phishing email. I didn't notice who is the sender and I connected my metamask wallet to a phishing website which drained my entire metamask wallet. Another Legendary forum member was scammed in the same way. Do you think it's because of a lack of knowledge? In my case, I didn't pay enough attention to the website before I connect the wallet even though I know how these scams works.