Pitkämäki has been in the top for over 10 years. People should give him more credit. He, Thorkildsen and Vesely are/were the last to undergo a superior training before it was introduced abroad.
Because the power of the throw come from not only the arm but from massive torch from the pivoting of the hips and shoulders. Also from planting the front foot known as a block.Its similar to how a baseball pitcher starts facing sideways. You're arm alone only has so much strength.
My brother broke the world record aged 21 by 11cm in training and was killed in action 6 months later. He was gifted, he always thought he was Tarzan. He could hit a pig on the run at 50 metres when he was 14.