Indeed, I don't just dwell on a single forum like chess.com, but have a broader interest, and interact with more different groups.
But as our Chinese members attested to, you can see that Xiangqi is not really an English word but a Chinese one, which is used to describe both the FIDE game and the Chinese one. The official English names for Xiangqi, Shogi and Makruk are 'Chinese Chess', 'Japanese Chess' and 'Thai Chess'. So they are all called 'Chess', with some qualifier to specify it further. And in a context where confusion might arise, the FIDE game is usually referred to as 'international Chess'.
So the English word 'Chess' is obviously used for the entire family of games. That further specification is usually omitted when it is obvious from context, is natural. That the chess.com forum is a context where it is pretty obvious people talk about the FIDE game, because chess.com does not support Xianqi, Shogi, etc., by no means implies that this suddenly becomes the only meaning of the word.
I don't understand your thought process to be honest. You're basically saying that because "chess" has different meanings outside of the common usage that the most common use of the word is not its definition!
Indeed, I don't just dwell on a single forum like chess.com, but have a broader interest, and interact with more different groups.
But as our Chinese members attested to, you can see that Xiangqi is not really an English word but a Chinese one, which is used to describe both the FIDE game and the Chinese one. The official English names for Xiangqi, Shogi and Makruk are 'Chinese Chess', 'Japanese Chess' and 'Thai Chess'. So they are all called 'Chess', with some qualifier to specify it further. And in a context where confusion might arise, the FIDE game is usually referred to as 'international Chess'.
So the English word 'Chess' is obviously used for the entire family of games. That further specification is usually omitted when it is obvious from context, is natural. That the chess.com forum is a context where it is pretty obvious people talk about the FIDE game, because chess.com does not support Xianqi, Shogi, etc., by no means implies that this suddenly becomes the only meaning of the word.