To the same extent that humans can be trained, so can AI.

For decades we had/have problems of people opening readme.exe that they get from an unknown mail address.

AI opens up a new vector for sure where a "trained human" that knows better but the AI they use does not. But AI is not worse than the average human. And of course AI will get better at handling this. Good enough? Maybe not, but humans are not good enough in this area either.

Scale is different though so I'm not saying it isn't or won't be a problem (will likely be a huuge problem). But it alone is not a sign of lack of intelligence and humans are exceptionally poor at it too.