My wild guess before reading the article: unhealthy food. A big part of which is herbicides and pesticides. I will now read the article.
I remember being in my 20s and not being able to sleep, but the most distracting thing I could reach for was a pile of books in my bedside table.
Now, I can't sleep, there's an endless stream of things to keep me awake.
The jokes about "5G gives you cancer" is probably not as funny, if you think about the sleep you miss while you doom scroll.