This is only true up to a point. Past ~125 IQ, you start running into serious social problems that mean such individuals are much less likely to obtain leadership positions, join intellectually challenging professions, or obtain advanced degrees.
This get's into questions of what is an is not a good proxy for actual intelligence. IQ tests are more likely to become arbitrary rankings once you looking at ever smaller population sizes and thus relative poor proxy's for g.
Still, Roughly one third to one half of the billionaires (45.0%),
Fortune 500 CEOs (38.6%), Senators (41.0%), and federal
judges (40.9%) attended a school requiring standardized test
scores that likely places them in the top 1% of ability.https://www.psychologytoday.com/files/attachments/56143/wai-... Further, why that's only a proxy for intelligence, those with different backgrounds may also have unusually high IQ's.
Granted we are now using a proxy for g to estimate IQ. But, as I was saying intelligence not scores on IQ test IMO it's a valid approach.
I am taking about different types of success. Otherwise you can just define a specific IQ test as success.
My point is if you look at Intelligence and assume they should be more successful with more IQ you need validate the IQ test to verify it's still valid at the outer edges. But, if you look at the most successful people and find IQ > 140 to be vastly more common than the general population then intelegence unlikely to be actually harmful.
https://polymatharchives.blogspot.ca/2015/01/the-inappropria...
http://psycnet.apa.org/psycinfo/2017-14279-001/