In this recent NYTimes article on the fashion of bike commuting in the Big Apple, dummy court attorney James Vicente declares, "Riding a bike should be normal, and you shouldn’t have to wear a funny Styrofoam hat."
He clearly has never handled a dooring case. Or a "T-boned by a fat lady" case. Or an "I fell over the speed bump" case. Or a "I clipped in and then ate it in front of all of my friends" case.
These events may seem harmless enough, but think of it like this: Picture yourself standing up. Now fall backwards without extending your arms, or stepping back to catch yourself. Your big fat head just struck pavement from an average height of 5' 1" if you're a dude, or 4'almost 8" if you're a lady. (Given a head length of 8".)
Even if you've been diligent about your calcium intake, your cranium is heading for a Humpty Dumpty moment when you fall off of your bike. You don't even have to be moving. It's a big drop for a very unbouncy, and quite important body part.
The NYTimes author concludes that not wearing a helmet, à la Dutch bike commuters (who have enviously made bike commuting a simple fact of daily life), is a "style perk" afforded by riding a stately Dutch bike.
If a point of the article was to examine ways, like introducing Dutch bikes to the city, to make bike commuting hip and fashionable to people who don't self-identify as "cyclists", the author should have more responsibly jump started the "wearing your helmet is cool, yo!" initiative in the process.
Because people fall--and not only when descending Alpe d'Huez in a pack of 20 cyclists going 50 mph. Even a fall from 0mph can have dramatic consequences.
Drooling on yourself for the rest of your life, Mr. Vicente, is far less fashionable than wearing a "Styrofoam hat".