You misunderstand the quote. It's not saying that CS positions are too competitive. It's saying they're described as being about competition. Medical degrees are competitive, but they're not about the competition, they're about helping people. Meanwhile, CS is promoted by hosting coding challenges and competitions, and the top-tier jobs advertise how their teams are so much smarter and more accomplished than everyone, and so forth. This creates the perception that not only is the field competitive, but that the competition is practically an end in itself, where in medicine it's an obstacle to the actual goal of helping people (or getting a gigantic salary).