You would have to ask to the engineers at Lear Siegler who made that decision many decades ago. That choice and the subsequent decision to print the arrows on

You would have to ask to the engineers at Lear Siegler who made that decision many decades ago. That choice and the subsequent decision to print the arrows on the corresponding keys of a single model of their product line are why we got hjkl for cursor movement in Vi first… and now seemingly everywhere.