Yeah, this is my problem with bowling and golf. If you're a professional bowler, literally your only job is to knock down the pins. Why do anything else? If you miss one, you're bad at your job. Ditto with golf -- the hole is right there, just get the ball in it!
(Honestly not sure how sarcastic vs sincere I am in this comment.)
Parent made an argument by analogy, no evidence needs to enter the picture. At best you can say his analogy is flawed.
It's not even flawed, anyway. If cars not being allowed is supposed to refute the analogy, then an obvious answer would be that Othello playing programs could also banned in Othello competitions (given that the solution can't just be internalized by a human player).
I don't think you understand the purpose of games.
This is like saying since we have cars, why do people still race?
Or "why even do shooting competitions, when a robot or a person with a laser scope can easily win them?"