Why can’t a bowler ‘throw’ the ball to a batsman?

Why can’t a bowler ‘throw’ the ball to a batsman?

The bowler cannot throw the ball to batsman since there are a number of cricket playing rules, which do not allow the bowler to straighten his bowling arm at the elbow during the delivery swing. Such deliveries have to be no balled by the umpires. In earlier days, bowlers were no-balled for delivering the ball with too high an arm. However, changes in rules tended to legalize what had been happening for some years as under arm evolved into round arm, then later into over arm.