It's not a matter of money or profession, it's an issue of bike selection. Most H-D models are very large, heavy, and powerful, unsuitable for inexperienced riders. Not picking on H-D, every bike company sells models that are not intended for new riders.
Have you seen the showroom prices on new Harleys? Educated professionals are more likely than any other demographic group to have that sort of disposable income.
Statistics show that new riders being on large-cc machines is the cause of many accidents. Alchohol use, inattention, lack of training, lack of safety gear, lack of high-visibility clothing, and riding in high-risk situations are all factors in motorcycle accidents and resulting injuries. I can't foresee a time when motorcycling is as safe as riding a bus or automobile, but there are many things we can do to manage the risks.
And as mentioned, sometimes an accident is just an accident and can't be avoided.
Keep the Shiny Side Up,
-Bob