I don't understand how someone could be tech-savvy enough to know about ETH and actually own some, while at the same time falling for such scams.
That is to say, gullible people are found everywhere but I don't think people inclined to fall for fraud are the same as get-rich-quick tech-heads.
More to the point - there is a significant number of people who started learning about computer security precisely because they got some cryptocurrencies. And frankly, if someone wants to really understand the details, it's hard to miss all the frequent warnings and examples of scams, hacks, leaks.