Wrong. The claim was never made that players got worse, only that their ratings dropped, which is empirically true. After playing AlphaGo, for example, Ke Jie dropped in the rankings and was quickly taken out of 1st place overall. The overall point though, is that AlphaGo produced nothing of value for humans, since there's also no evidence that players have improved since AlphaGo's creation. Factoring in the immense cost and human brainpower wasted on creating a superhuman perfect-information-game-playing program, and it's easily a net negative for humanity.
"there's also no evidence that players have improved since AlphaGo's creation"
Read this for example. The author is Korean pro.
"The upside is that we sometimes see a player who was somewhat past his prime suddenly climb back to the top, having trained with AI more intensely. There are a growing number of young and new pros who demonstrate surprising strength. This change gives hope to all pros who dream to become number one, and also makes competitions more interesting to fans as well." [0]
> Factoring in the immense cost and human brainpower wasted on creating a superhuman perfect-information-game-playing program, and it's easily a net negative for humanity.
Hear me out - what if we learned something about creating AI by creating a new AI?