Automobile Accidents And Obese Drivers?!? Smaller Cars?!

Honestly speaking where do these people get off by saying that obese drivers are more at risk for automobile accidents when driving? 

This completely clouds and puzzles my mind as to why some research studies go under way. On the brighter side it may be because they don't have anything better else to do however lets look at the statistics.

The first statistic says that, "The heaviest drivers were 80% more likely to be killed in crashes than those of normal weight".Just because the researchers haven't even began testing their cars with more heavier and larger crash test dummies how would they genuinely know?

 I firmly believe that everybody is at the same risk....if i can flip my car over and get trapped in it and I stand at 5'4 and weigh 115 pound's what more for a person that is larger. This person too can get stuck as well and may not be able to get freed. I find this to be utter discrimination at its finest!