I'm not going to pretend that qwerty is the optimal layout, as if such a thing exists, but this heatmap analysis you've done is very flawed, and if you are speed typing enough that you are at risk of a repetitive strain injury, changing the legend on your keyboard is not the solution, buy an ergonomic keyboard. Especially necessary if you're a programmer since modifier keys are bad on every layout except ergo keyboards with thumb clusters.
This is a myth created by Dvorak marketing so that they could convince people Dvorak was a faster layout. In reality, qwerty is an optimized keyboard layout derived from a keyboard in alphabetical order intended to help people type quickly, and most of the best speed typists use qwerty.