Who hurt you lmao
In all seriousness, there should be a control for liberal arts education. Computer Science is a specialized and rigorous field. If it's taught as the sole subject of a person's education, of course they are going to miss a lot compared to a degree in the arts. Meanwhile, as a computer science student at a liberal arts college, I'd wager I can communicate just fine.
Further, this chart feels disingenuous here due to your use of it to seemingly attempt justifying a cause-effect relationship where only correlation exists. Of course Computer Science students perform poorly in reading and writing compared to Philosophy and English majors. People who like reading and writing gravitate towards those majors, so they naturally will have a higher population of good communicators. The real issue is the failure of primary education in its attempt to train the general populace to read and write with any reasonable level of proficiency.
Also, since when are reading and writing the test of a person's cognitive function? Some of the most genuinely intelligent people I know couldn't write a good analytical essay if their life depended on it. Everyone has different strengths; for Computer Scientists, those just happen to be mathematics and deterministic logic instead of interpersonal communication. I don't get where the hate is coming from.
P.S. I'd read the study but the image is too low-res to make out the URL