Stoicism is an ancient philosophical doctrine that promotes moderation in everything to achieve psychological and physiological balance. In modern science, this balance is called homeostasis. The Stoics taught that too strong emotions should be avoided, because they put a person out of psychological balance.
Stoicism applies to gambling as well. Don't try to win too much. You also need to try not to lose too much. The player needs constant control over their own emotions.
The best thing in life is the moderation, if you do not live your life on that balance then you are going to lose your balance and fall. Gambling is the same, if you do not gamble at all then it's fine, if you gamble with just free faucet stuff then you will not find it enough, and if you gamble millions then you will be upset when you lose, so find that right balance.