In my week in Manhatten last month I saw several crashes (including a near miss with a sit-down scooter riding in the bike lane who had to bail and slide before nearly crashing into a crowd of pedestrians), pedestrians jumping out of the way of bikes who don't stop at red lights, and bikes swerving around car traffic barely getting by without taking out car mirrors or getting run over.
Biking in Manhatten is not for the faint of heart and not for anyone who isn't decently athletic.
You could have lauded the subway system, but you chose bikes?