I can appreciate both of your comments MapleLeaf and Junehhan even though they're quite different. Here's why. Having owned a motocross bike (a 250CC Yamaha YZ) and two street bikes(an 1100cc, and an 850cc) I look at it this way......... sure it's practicality as well as wisdom that you're speaking junehhan. However, the reality is that there are a number of the bikers who are deep down inside risk takers and thrill seekers. Is that wise? No. is it smart? Not really.
But it's kinda like the reason why some of the same type of people love roller coasters, hang gliding, or sky diving. There's a degree of danger, or atleast perceived danger. That's what the thrill seeker craves deep down inside. To them, if there isn't any risk at all, then the activity in question would be boring. Is boring safer? Yes. But boring isn't what most people really want, nor is it what they'll always be satisfied with.
That's the reality of it. Am I saying that driving in rush hour traffic at 80 MPH is justifiable or even acceptable? No way. The thrill seeker in us should be tempered w/wisdom, and patience in finding an activity weather it be behind the wheel of a car, riding a bike, or something else that's a controlled risk, or one that isn't such a long-shot. And ofcourse we all have to decide what is acceptable and what isn't, and exactly how far we will go w/our thrill seeking. Ofcourse one of the main things we need to consider first and foremost is how much the activity in question would put innocent bystanders at risk. We cannot allow ourselves to become like a bull in a china closet. Especially when the potential china in that closet is other peoples' health and well being.
But my point is that many might say that they wouldn't drive crazy while operating a motorcycle. However, take some of those same people who say that, and give them a 10 or 11 second motorcycle for a year or so, and many of those same people (especially guys)will gradually get crazier and crazier the longer they have control of that power, and the more they begin to master it. It can easily become like an adrenaline addiction (been there done that). Unfortunately it's human nature. Some people are more prone to that than others. Some are more effected and held back by fear(which isn't a bad thing) while others seem to thrive on that fear, and seek more of it. Does that make it such behaviour unavoidable? No. But it just means that many of us shouldn't be so quick to judge others who are also thrill seekers like we are too.
There are different degress of these types of behaviour, and it does get to a point w/some people of being out of control, and ofcourse our goal should be to avoid or prevent that from being evident in our behaviour. I think that it all boils down to having a balance. And not allowing the pendulum to swing all the way to one side(which would be too boring) or the other side(which would be too dangerous). The key is simply balance.