HUMAN ref misjudged/overreacted to human communication (Serena, coach)
...triggered HUMAN defense (Serena) + protest of human (ref) misjudgment
...Serena protest was deemed overreaction + punished by human ref
As Buffett said of newspapers. If the internet existed first, newspapers wouldn’t.
If technology (high-speed cameras + net & line sensors) existed first, tennis umpires wouldn’t.
Obsolescent.