Rear Sets

I've been looking at the racing pics on this site and got to wondering "Why do all the bikes have rear sets mounted so high?" Now, if you're a midget, need ground clearance for fast cornering, or just not tall, those high mounted rearsets might be just the thing. I'm a 6'5" animal who would prefer not to pick his nose on his knees while riding, and so needs (read "wants") something other than regular foot controls. So, what's the answer to this dilemma?

Afterthought - Is Raask's reputation for breaking deserved? When do they break? I mean, under what conditions and are they consistent about it?

If the answer is obvious to YOU, don't laugh , I really want to know.

"Not yet racing" Stattz.