While this is a fantastic article, I kind of want to disagree with some of the points listed.

IQ tests are standardized in a way that you don't need to be a scholar or academic to know how to solve and/or answer the questions.

Look at it this way, in my opinion, the standard IQ tests of today are moreso a test of how quickly you can learn or adapt and solve, rather than of what knowledge you have.

For example, I bet that a PhD candidate (or just a "genious") would have much less difficulty learning about the insides of a car and how to fix it, than a mechanic would have in getting his PhD or equivalent to that level of knowledge

I find that people with higher than average IQs have more work ethic and learn much more quickly than people who have below average IQs, and I don't think this is a purely coincidental thing.