Only 7,269 have ever summited Everest. I suspect if it was as easy as you make it out to be, that number would be way, way higher.
Few people have enough money to do it. That doesn't mean it's difficult.
Those two figures show how the number of deaths is less than 5% of the count of those who actually made it to the summit. The death rate would be less than that due to the large number of people that end their attempt partway through.