You can extend that way of looking at it so that you never overtake anyone anywhere, just because they might catch you up again a minute later. There's often no point in passing a queue of Wombles one by one, pootling contentedly along in their Euro/Nippoboxes, but what if you're the second car in the queue?
Like the last poster, I like driving fast. I know the capabilities of my cars, and think/delude myself (choose whichever you prefer...) that I'm capable of doing so safely, and I certainly don't cut it fine and take the chances I did when I was younger and less experienced, but I don't see the harm in it. There's room for us all on the roads.
Male teenagers are more likely to be involved in an accident than any other category of driver. I wrote off my second car, a Cooper S, over fifty years ago because I didn't know how to drive it fast. I know better now. Of course speed limits cater for the lowest common denominator; they have to, but I don't fall into that category now. It's not speed that is dangerous, it is inappropriate speed.