I think if anybody's to be commended for their principle it's probably the organisers? They have their dress code, he violated it, was warned, continued to violate it, and they enforced the rule despite his name.
This is sport event after all, and he is an athlete!
It is like asking female athletes to wear corset and long dress, because that was traditional dress in Victorian England!
https://www.abc.net.au/news/2023-12-29/chess-player-fined-ov...