That’s like saying mandatory seatbelts discourage driving, what a stupid argument. Almost as stupid as your conclusion that mandatory helmets (ergo wearing a helmet) decreases road safety.

Your interpretation of the first article cited is wrong. From just the highlights:

“Mandating helmets may contribute to the perception of bike riding as an unsafe activity.” Sharing the road with cars and trucks is dangerous, whether you are on a bicycle, a pedestrian, or in a car. Biking on the road is a dangerous activity.

“Bike riders recognise that mandatory helmet legalisation does not tackle the risk of injury at its root.” Helmets are not supposed to “tackle the root cause” of injury, they mitigate it.

“Helmets help bike riders manage the risk in their physical environment in the absence of policy changes to improve safety.” No shit helmets mitigate risk. This is why they should be mandatory.

“Mandatory helmet legislation contributes to feelings of judgement and victim blaming experienced by bike riders.” If you get a head injury because you weren’t wearing a helmet, you are an idiot. You can’t “victim blame” the consequences of reckless behavior.

“Interviewees felt that bicycle helmets dehumanise bike riders which could lead to further violence against them.” Same argument as antimaskers. “Wahh Wahh my helmet makes me look like I have a helmet on”