The learning always comes once we've made a mistake and for these gamblers, they'll also learn theirs soon. If they keep on increasing and they're having some troubles of reducing it and become consistent even if they're going through a losing streak. They probably have a lot of money to lose for if they keep on doing it. The mistake comes often when they have realized that they're doing it very wrong and that's why if it's them to decide whether they should increase more after losing, that's what they have used to do.
Due to different mindsets, not everyone can immediately recognize the mistakes they've made. Some players may have made mistakes but remain oblivious and insist on their own principles of winning. When experiencing a losing streak, it's best to stop and take a break, as continuing to do so will likely only complicate matters. While luck might lead to a big win on the next bet, that's not guaranteed. Addicted gamblers may become more aggressive when they've experienced losses or when they've made a profit.