First, your statement that he "cares so much about the bias he can't be bothered to find it" is objectively false. He found two examples in the summary, which is what 80% of people will read, and will anchor interpretation for all readers. Bias in the summary is much more significant than bias in the main article, even if it returned to even-handed interpretation later.

Also to your point: "This is largely how people operate today, they start with what they want to believe then they go looking for it."

If he went looking for it, he certainly found it very easily. I would agree with you if he had found the bias in niche topics and in later sections of articles much less likely to be read. But when the articles with the most traffic and most contributors demonstrate bias, its clear there is a problem.