"If a situation was fine before and changing something either does nothing or makes that situation worse" But it's not. You forgot the size and weight of vehic

"If a situation was fine before and changing something either does nothing or makes that situation worse" But it's not. You forgot the size and weight of vehicles from previous generations. You forgot the higher fatalities of the past. You're ignoring that people today are taller. You're also ignoring that pedestrian fatalities have gone down over time when looking at the parents and grandparents timeframe to today, despite the more recent uptick.