I make these kind of comments every once in a while. They're usually downvoted, I assume, for being off-topic or unnecessarily harsh ('We might have cured cancer!' vs 'I can't read the article because of the video behind the text.').
But I hope some people see them and work on the issue.
Sometimes, if enough other people agree, these kind of comments get voted up. I guess this issue didn't annoy most people enough to get the up votes.
Just because the author created Redis doesn't mean the site isn't badly designed.