I’m pretty sure even the inventors of IQ test say it shouldn’t be used to measure the general intelligence. The only thing IQ test measures well is how good you are at solving IQ tests.
Also
IQ scores have been shown to be associated with such factors as nutrition, parental socioeconomic status, morbidity and mortality, parental social status, and perinatal environment.
Source: https://en.wikipedia.org/wiki/Intelligence_quotient
Not to mention that you can get anyone to do pretty much anything if you present them only the right information in the right context.
How to create successful cosmic horror:
Step 1: Dive deep into the sea (in a bathyscaphe).
Step 2: ???
Step 3: Profit.