Of course, that's definitely important. In the US most cities aren't designed to be walkable/bikeable at all. That's dangerous and of course city planning should account for all sorts of transportation from walking and people in motorized wheelchairs on up.

I do agree with George Carlin on the push for safety, though. It's not kind and cuddly to say, but I also believe natural selection has it's place.

A large scale environmental change generally correlates with a larger than normal amount of animals in that region dying as those with the adaptations that best fit the new reality are selected for. The birds that can't reach the seeds now die off and those with the longer beaks survive to pass on their genes and the species ends up with a longer beak than it had a few decades back.

Completely minimizing deaths in a radically different environment only causes more and more generations where the bulk of the population really isn't suited for this environment and often suffers in varying ways because of that. Accepting that not all members of a species will do great in the new environment and that there will be deaths as a result of that leads to much quicker adaptation where a much larger portion of the population doesn't have those issues.

Every aspect of human life has changed with an insane exponentially increasing pace over the last 200 or so years, so the environment almost all humans deal with every moment of every day now is almost nothing like what we evolved to deal with and handle. That alone will lead to deaths.