From your link:

The crackpot sees Einstein as something magical, so they compare themselves to Einstein by way of praising themselves as magical; they think Einstein had superpowers and they think they have superpowers, hence the comparison.

Nope. Crackpots compare themselves to Einstein because:

I say this, because I want to do important things with my life, and I have a genuinely important problem, and an angle of attack, and I've been banging my head on it for years, and I've managed to set up a support structure for it; and I very frequently meet people who, in one way or another, say: "Yeah? Let's see your aura of destiny, buddy."

[Albeit I do like his straight in your face honesty.]

It's not about choosing 'important' problem, it's about choosing solvable important problem, and a method of solving it, and intelligence helps, while unintelligent people just pick some idea out of science fiction or something, and can't imagine that some people can do better.

Had it really been that choosing right problems and approaches was matter of luck, we would observe far fewer cases where a single individual has many important insights, the distribution of insights per person would be different.

edit:

It is very easy to fail at this because of the cached thought problem: Tell people to choose an important problem and they will choose the first cache hit for "important problem" that pops into their heads, like "global warming" or "string theory".

The irony here is quite intense. Surely a person who's into science fiction will have the first "cache hit" be something science fictional, and then the first "cache hit" for the solution path be something likewise science fictional. Also a person into reading about computers will have first "cache hit" for describing the priming be reference to "cache".