If you are considering playing poker for a living, this is what you are dealing with when you play poker for high stakes.
https://www.pokernews.com/news/2023/12/wesley-airball-accuse-mars-cheating-poker-games-45012.htm
I love the part where they put a "special" deck into the game........also it seems that there are decks imported from China that are marked and you can see the actual cards being held by all the players, and are all but impossible to be detected.........probably you need special contact lenses to see the cards.
When I started playing at the casinos in Atlantic City back in the 80s it was drummed in me to stay away from poker because the players from Russia, Ukraine and Kazakhstan would work in teams and use signals that nobody else knew about and fix most of the games, especially in the high limit rooms in Atlantic City. There was always a problem with them adhering to the poker rules and regulations back then.