Even with a lot of questions surrounding the IQ, the generally understanding of intelligence and the importance of it, one fact is quite undisputed:
If controlled for social factors, IQ is by far the best prediction of your future educational performance. So the chance of becoming a scientist is directly correlated to your IQ.
The original IQ test, as invented by Alfred Binet, was created to determine in what class to put children who started school. In 1882, France introduced compulsory education, but many children in France had no or questionable birth certificates, and when they were about to start school, it was not clear what their real age was and which class would be suitable for them. And then there were the children who required special care, and until the beginning of the 20th century, it was up to the subjective judgement of the respective teachers to determine which children should get it. Thus Alfred Binet and Théodore Simon developed a test to more objectively assess the educational potential of a child, the Binet-Simon-Test, which was to calculate something called the "intelligence age" of a child, and which was used as a criterion in what class to put a child.
It should thus be expected that the IQ as measured by the Binet-Simon-test (and the later development Stanford-Binet-test and all subsequent IQ tests) is quite predictive for your educational career, because that's what they were invented for.