Many more than 2% can achieve a 130 IQ score by preparing for the questions and taking sample tests. Many people do that, especially when IQ tests are requirements for entrance exams for private schools. I’ve seen this first hand from the cohort of children at my kids’ schools.
Sure, but that leaves your argument about the innateness of the characteristic it's measuring as handwaving and special-pleading. You see the same effect with SES in twin studies, for what it's worth.
Guess the rest of us are potted plants.