When you confidently bet on a game that is obviously a loser, you most likely avoid excessive excitement. Perhaps you want to lose subconsciously and never return to this type of game again. You know, our psyche is multi-layered and also consists of a subconscious personality. And this subconscious personality can be in conflict with your consciousness. And being in conflict with consciousness, the subconscious may well want to lose. Perhaps the subconscious of a particular player does not like gambling at all? Of course, this may be a coincidence, an accident. But on the other hand, we understand that in some cases, betting on an obviously losing event is far from an accident.
Psychology counts about 16 models of behavior in each person, it is possible to even assert with a stretch that in each of us there are about 16 subpersonalities. And this is without taking into account that, as you correctly wrote, consciousness is not our brain center. The brain is a separate organ that is constantly lazy, and consciousness tries to drive and motivate it. Therefore, strong conflicts within the personality are really possible. Especially when the brain wants quick money and to be lazy, and consciousness sees this, but weak willpower cannot change the situation.