Exception! Exception!

"Equable" is a double-take word for most readers and if that was the desired nuance, "evenly" would have been much better.

On the other hand, "equitable" has a usage relationship of "fairness" with a touch of "kindness". Likely the intent intended. - Besides "equable" is clumsy in sound, while "equitable" roooooools up and down off the tongue.