It's a deceptive title, but it comes straight from the blog post. It's not going to teach you about straws (thankfully...are straws that interesting?). It tells you about the sources of plastic waste in general and justifies the most efficacious solutions to avoid plastic pollution. It is a short article focused on common sense, appropriate pictures, and well-chosen data.
I clicked on the link specifically because I thought it might be about straws themselves. I agree straws don’t sound that interesting but I don’t really know much about them and for all I know there’s something interesting about their manufacture, perhaps the difference in sizes, or something else.
OTOH I am already well aware of plastic pollution problem and straws’ relative place in it (both perceived and real).