Coincidence probably. But another explanation might be that they are so focused on their games/ the present moment that their expressions become almost involuntary and exaggerated.

After spending so long unable to talk due to FIDE rules about talking during games, these players have to find ways to not go crazy so the only way they’re really able to communicate is through facial expressions. It’s almost as if they’re talking with themselves in their head

Cause they see what you dont