There's whole industry to solve this problem and yet there are many millions affected each year meaning it's not even close to being solved. Maybe quite the other way around judging how companies like Google recently said it's a big problem for them.

The dude above says it themselves: you need to be smart to not fall for some malware(which they are wrong about, there many examples of smart people falling to phishing). Luckily LLMs are perfectly smart and never do stupid shit, right?