He explicitly says this in the article. I think the majority of commenters only read the title.
I've lost count of how many times this has happened.
In one case, I went through and read several dozen comments on an article. No exaggeration: all commenters (100%) said nothing whatsoever about the article's text. They were all just holding forth on their own opinions and experiences related to the headline.
Just look at YouTube, lots of people comment on videos without actually watching the video despite it being right there.