Based on the other sleep link posted here [1], this article itself warning people about sleep might be the thing harming people's sleep and health.

It's fine to tell people who are doing other things instead of sleeping that sleep is important. But many people don't sleep that well/long and I think this message about getting 8 hours of sleep is very harmful to them, since it causes anxiety and insomnia. It seems many people and cultures naturally sleep around 6.5 hours not 8 hours, so people should not worry if that's how long they sleep.

[1] https://www.theguardian.com/lifeandstyle/2018/apr/20/cant-sl...