[zibby8]

The issue isn't his belief. It's that he's throwing a tantrum and has ruined two Chess tournaments (so far). He's free to believe whatever he likes, but to resign in a match in a tournament is not fair to all the other players.

[Retric]

It’s hard to see how other players are negatively impacted. If anything the publicity is likely a net positive for them.

[zibby8]

The top 8 players in the tournament get invited to the next tournament. Hans Niemann got a free point from the game Carlsen resigned. That impacts the standings for all the other players. It’s hard to see how they’re not impacted.