actually one of my grandparents was a typist at an accounting firm, and apparently num row is far more efficient for numbers in generally because you use 10 fingers and your thumbs are close to your “new home row” (aka the number row while you’re typing numbers), and whilst possible you’d never use both hands in the num pad because it’d be awkward and probably damaging to your wrists, and you’re rarely typing just numbers so having the num row closer to the home row is part of the efficiency calculation

… if we’re being pedantic, which we absolutely are