What is the time frame for this 75%, the first year? For long time riders, I'd say the accident rate is very close to 100%. Of course, that is also true for cars. As we say, "there are two kinds of riders, those that will fall and those that will fall again.
Again, what is the time frame here? I've ridden since 1990 and nobody I have known has died due to a motorcycle accident in this time. Virtually all the riders I know have gone down during the same period. All the people I ride with dress appropriately (helmet, gloves, leathers/synthetic suit, boots).
Life is dangerous and always fatal. Each person has to choose how to deal with the danger, whether it involves sports, vehicles, eating habits, smoking, etc. Many riders like to play down the danger of riding a motorcycle. It's much more dangerous than driving a car. It's almost as dangerous as riding a bicycle in the street.