Comment by willswire
Everybody cares actually. Obviously the author cares more about investing the time to write this blog post than to take a sledgehammer and some concrete and fix the bike ramp himself. Or he cares to avoid the potential interactions with law enforcement that would result from such ridiculousness.
The problem isn't with people not caring, it's that the deepest affections of the heart are selfish - incurvatus in se (curved inwards).
"Our nature, by the corruption of the first sin, [being] so deeply curved in on itself that it not only bends the best gifts of God towards itself and enjoys them (as is plain in the works-righteous and hypocrites), or rather even uses God himself in order to attain these gifts, but it also fails to realize that it so wickedly, curvedly, and viciously seeks all things, even God, for its own sake." - Martin Luther
Everybody cares, but not enough to make a difference