Because when you are trying your hard to win, it will make you overthink and that your mental state will get stressed out.
I think this will work for both land base and online casinos.
As far as I know, the game of poker is one of the most ideal gambling bets that many gamblers enjoy doing, whether on the online website or in a land casino, Poker is also a place of entertainment, because poker can train bettors themselves in setting strategies to determine loses and wins.
Winning and losing at the poker table is largely determined by the players themselves, I often see poker bettors who often win, these people look very relaxed, they don't show mentality and stress to opponents, this can make it easy for your opponent to read expressions or in other words you can read facial expressions, if your opponent understands psychology, for this reason we often see people who are relaxed at their table who often win.
different from what we do at the online poker table, you really have to understand the dealer / opponent card, facial expressions are not needed, strategy and expertise are the main thing.