I was thinking just yesterday that traction control is one of those things the sane and skilled do not need.
My bike makes probably 30 or 40 horsepower less than the BMW, but even if I ride it in the upper 2/3 of the rev range (as opposed to the upper third of the rev range), it starts shooting down straights alarmingly fast, so I am braking for even what I would normally consider curves and not corners. (Note, this thought was while on a forested road, US 49, where you don't see around the next two or three corners.) In that rev range, even my relatively cheap sport-touring tires have no trouble with traction. If I rode in the upper third of the rev range, I would have other problems, mostly the one of not really having any fun--frequent very hard braking. The point is that modern tires are not really having issues with traction on the street, even for lots of HP.
So if we go to the extreme, track riding, then you have a bike that is saving you from yourself. Are you learning anything about throttle control or drifting? What do you get from traction control then? Questionable bragging rights, that you went around the track faster than somebody with proven skills? Is losing traction under acceleration the biggest problem facing track riders? I would think it would be judging a doable corner speed. Does traction control help when you are under trailing throttle and have exceeded the tires' cornering traction?
And I am not considering traction control for those totally unskilled and luckless, the kind that shouldn't be riding or ones that seem to find oil-soaked roads. Those people will find some way to bite the dust regardless. And they are not likely buyers of this BMW.