See, I think this comment is far more interesting than the article itself. I'm certain there is a method of finding high value-low effort startup ideas digging thru unconventional data like the link you provided.
A few industries I’ve researched this way:
* Porta potties * Dumpster rental * Bail bonds * Funerals
There are millions of legitimate businesses out there that have hardly been touched by tech.
Myopic to say the least.