There are different casinos, I know of a case where they didn't want to give a player his winnings in roulette because he made a bet and slightly touched the field of the neighboring cell, this is absurd but they didn't give him his winnings. There are also situations when such casinos won't let you out with a big win until you continue playing and lose some of it. But to avoid this, you don't need to go to such dubious casinos, I understand that not all cities have good casinos, but then it's better to play online than to go to such casinos and then get even more nervous when you can't take what you won with you.
It is correct that not all cities don't have casinos and/or a required number of casinos so it is better to use online gambling casinos, which may fulfill the demand of a gambler. Though there is almost no difference between the online gambling and offline gambling. As they both can make us greedy and we may loss control of our emotion. But in offline we may not be able to rearrange more funds as a result we may avoid more loss in casinos.