Many gamblers can't control the urge to increase their wager when gambling as they think they can win more when they use higher wager to bet. They can win but winning when gambling isn't what we can depend on, we'll hope to win but also we should tell ourselves that we might not win so we won't get the urge to increase our wager. When we use small amount to gamble, we give ourselves more chances to bet for a longer time and them we can win from one of those bets.
When I'm gambling, I'm very disciplined to not let my mind tell me to increase my bet, I would rather reduce my bet than increase it. There are ways we can avoid this feeling and that's by having a budget for the week and each game we want to bet on. We can get carried away when gambling but if we have a budget, we'll always be reminded that we're exceeding our gambling limit for the day to stop.
I agree with you, because I also do the same thing, but gambling can change someone's mind in a short time, therefore we still have to be careful even if we bet a small amount, because it doesn't cover our possibility of feeling emotions related to gamblings. remind ourselves no matter what because everyone has different thoughts so I think everyone has their own way. What is clear is that you should not be lulled by a victory that is only temporary.