An individual who is more intelligent might be less likely to pass on their own genes, but may well make the species as a whole more resilient. Looking at evolution from the perspective of the individual is a mistake.
Note that being "less likely to pass on their own genes" means exactly the same thing here as having a "net evolutionary disadvantage", so your comment is actually agreeing with the sentence that you quoted, despite what appears to be your intent.
Regardless, there is a valid discussion to be had about evolution at levels other than the individual, but it's just not as simple as replacing individuals with species as the biological unit of evolution.
Edit: To make it a little more clear what this means, treating the organism as the unit of evolution is like treating the cell as the unit of walking. Yes, walking is the action of individual cells, but nothing interesting or relevant to the process is happening at a cellular level.
This implies effects in the population that are counterintuitive from the perspective of the individual, which is why it's important to make the distinction.
Perhaps the more neutral framing is this: There are things that happen to life which you will not be able to explain using a primarily gene-, individual-, or group-centered perspective. This is because evolution is complex, and anyone who claims to really understand it is lying.
I've been advocating for the population perspective mainly because it necessarily includes what's going on at a lower level, but the safer truth is simply that anything you think you know on the basis of theory needs to pass through many levels of analysis, and then be filtered with a healthy dose of what really happens.
True, but a single organism with a new trait failing to reproduce means that the trait cannot be passed on, and therefore does not exist in the population in an evolutionary sense. You absolutely can't ignore individuals in the evolutionary process.
I mean that's pretty much just standard evolutionary theory. C.f. sickle cell anemia.
Last thing I saw on it was a blogging heads video [0], which convinced me it's not as dead as I thought it was.