When there are more cyclists on the streets, car drivers are used to taking care of them, so its safer for the individual cyclist.
Also, for many people, being safe includes not getting stopped by police. It's a different kind of safety, yes.
This isn't really hard to see, so i think your hate of clickbait is clouding your vision. There is no deception, mandatory helmet laws make cyclists less safe. At least that is the authors opinion.