This comment cannot be saying what it seems to be saying, can you clarify what you mean? Maybe it was worded oddly.
This is contrary to the available science. IQ and earnings are strongly correlated.
There is a perfect correlation between the two
In general, it seems like you are attributing all academic performance to some innate "intelligence" in the singular. This is just a bad assumption. There are many factors behind how well you do in school, and most of them are quite obviously social. That doesn't mean that your parents academic performance doesn't influence your, but there's no basis for claiming that it's genetic. We can help people do better, and we have done so. Of course, what we're doing now isn't perfect, but that doesn't mean it's not worth it.