Uh, Ferris:
"IF CLASS E IS "SAFE", WHY ISN'T ALL THE AIRSPACE IN THE US, OR THE WORLD, CLASS E?"
....or conversely, if Class A (or insert your favourite airspace here) is the safest airspace, why isn't all the airspace in the US, or the world, Class A (or insert your favourite airspace here) ?
Why aren't *all* flights undertaken by dual 10,000 hour pilots under the IFR with at least twin turbine engines ...and 300% fuel reserves...and on and on ad nauseum
Argue, but at least be logical.