Having excessive confidence in gambling can certainly make a person do more crazy actions, I am sure that they are actually unable to take responsibility for their actions when the final result does not match their expectations which means that having high confidence in winning will only make you end up with regret and disappointment along with a worse situation which means that your number of losses is even greater. On the other hand, this is a typical gambler who comes with the intention and purpose to earn so they bring high confidence because they are based on the hope of winning, while responsible gamblers are those who prioritize or prioritize risk management so as you said that all they think about is stopping as soon as possible without thinking about the recovery phase.
Excessive confidence in gambling is just makes them forget about how to stop playing gambling because they will be sure that they still have a chance to win. But that doesn't seems like as they expect because when they lose, they will difficult to win and that can increase their losses. If that happens, many gamblers can't take responsibility for their actions because they are not thinks that can happens to them. But after seeing what happens to them, they realizes that they are now in a trouble and difficult to solve if they don't have a strong intentions to solve the problems. They will regrets of what happens to them but some gamblers will not feel too regrets as they can repeat the mistake in the other days. That's why we must be responsible gamblers to prevents many problems that can occurs to us while we playing gambling because that can gives worst situations that we never imagine.