Not having to be so outcome dependent on anything that a regular person would want so badly like outdoing the casino at a game of blackjack is really tough! First of all, it's not smart to go into gambling mode while not knowing how to crunch numbers so the few friends who are into gambling all suck at it for the most part. I think that's really going to turn into a problem if they continue to ignore that the odds are stacked against them and that playing for money in the short run is going to end up costing them more from only feeling lucky and not putting in the actual work because of how it never crosses their mind.
Honestly, with these many 50-50 games in casinos, there's a problem in that you have pay the table to play each game. For example, let's say that you play 100 games. You will win 50% of them minus having to pay for 100 games, so if your bankroll is only like $1000 while the fee to play each game is $5 and you are betting only around $10 then your total expected earning will be $0, so the house would win your $1000 in the end. This is such a stupid strategy and my friend believed in this that he was able to have a run where he played for eight hours straight and withdrew more money out of his account and ended up with a loss of $2000! The next time he went to the table, he claimed that he no longer felt the excitement from winning and he was sick of it. Well of course, after taking that kind of loss, you can expect to give those small wins back to the house.
There is a way to use a martingale strategy which is doubling your bet for each loss so you recoup plus gain a little but that is also risky if you don't know how to count cards. Probability wise, it will make things run in your favor so you would need to have a very healthy bank roll and sneaky methods to go undetected as a card counter. These days casinos are making it harder for card counters to make a living like reshuffling sooner to keep it randomized and giving the house an edge. As long as casinos have the 50-50 games, they still get you on the long run from making you pay a fee.
Some impulsive people just don't want to take the time to understand this and feel their way while being reckless with their gambling habits. They emotionally reason that they are good enough to win and support their lifestyle after seeing a lot of players winning to get them excited. There is definitely a mental disease these people are going through, and it's sad that casinos are also capitalizing off of them. I think gambling at casinos should really be a business for bored, rich people who just want to throw their money away or feel lucky for a few nights just to feel like a happy kid again.
I have basically said that being rejected is like losing while invested heavily and being denied a big win at a casino game. It can hurt a lot, and the normal reaction is to just leave without making a scene. A few, other players at the table may laugh at them because it can be funny too, and I'm not going to discourage it actually. It's just life and to not make any adjustments over it while thinking through things and continuing to make impulsive decisions instead, it's just plain foolish and will keep you from succeeding.