I can't argue that those sports are dangerous, but I think this list would put things into perspective somewhat.
http://en.wikipedia.org/wiki/Driver_deaths_in_motorsport
Also, suffer a tire blow-out at 200+kph and then tell me there is f*ck all risk. I lost it at Barbagallo raceway at 160 (was a flat, rather than a full puncture) and skipped a dozen heart beats in the process, without doubt the most terrifying thing I've ever experienced bar nothing.
Also, in terms of formulae racing, indeed they are well protected now, but that was only due to the many reforms made throughout the 80's and in terms of F1, the massive changes initiated by the double fatalities of Roland Ratzenberger and Ayrton Senna at the San Marino Grand Prix in 1994, F1 has not suffered a solitary fatality since (although some accidents have happened where I assumed that one would occur, but miraculously no driver has even been seriously injured in a car in that time). None of those sports you mentioned present either the extreme forces nor the large number of, and variety of variables at play at a given time (ie; part failure in terms of aerodynamics, hydraulics, suspension, tires ect, weather, accidents and so on).