The parent in the article had no idea their child was riding without a helmet, and there is no reason to believe they did not teach their child to ride with a helmet.

If the goal is to actually reduce harm, infrastructure changes will have a far larger impact than education/information campaigns to convince kids and parents to be safer. This has been shown many times over by the NHTSA and the WHO.

Interactions with cars make for many more conflict opportunities during rides. Shared paths with pedestrians in high traffic areas do the same, but with much lower consequences. Dockless electric bike/scooter companies encourage adhoc rides which drastically reduce the chance that a given rider will have proper safety gear, and increases the likelihood of riding under the influence of drugs/alcohol. Having to deal with lots of intersections with stop lights/signs further increases conflict opportunities.

Separate, protected, and streamlined infrastructure for micromobility will go much further to protect people.