To be fair, getting hit really hard by a car isn't healthy either.
As for the big complaint of this thread, I'd be willing to guess that an event like this raises the awareness for other cancers as well. From this thread, it's clear that people are more than aware of those other forms. Just because you're seeing all this pink doesn't mean you have to turn around and donate time/money specifically to breast cancer research. Donate to pancreatic, to testicular, to whatever you want. If the pink just happened to be the reminder for making that cancer donation, success.