yes, airbags and crumple zones do improve safety, but even those are not without negative consequences, like bigger, heavier vehicles (which is more dangerous to others) and higher sense of psychological safety leading to being less considerate, less attentive, and more reckless.

that's not to argue that those tradeoffs aren't net positive, but that they're still tradeoffs to be considered, rather than short-circuiting to "of course it's better!".