Is likely due to how humans react to issues. They fix it or make a big deal to over fix it when someone gets hurt. The baseline risk shifts and people will get scared looking back doing a mental calculation: lower risk better then higher risk.

Stuff like training wheels, bike helmets when you are just doing leisure rides. Don't get me started with bike helmets, people wear them and do risker things, drivers drive less careful around them, and you get a false sense of superiority instead of being more careful. If you're on the road/off roading, sure, but now you can get fined in some place for not wearing is one small example of safetyism taking over.