It's better to have that limitation and also have that courage to tell yourself that you are already good with your sessions, whatever the outcome.
A practice that everyone should learn and used to avoid gambling addictions that can lead to worse things to happen in life.
That's what a gambler must have so he doesn't experience big losses. But unfortunately, not many can apply this when they gamble or some of them can apply it but after a few rounds, they become so passionate about winning that they forget about it.
In practice, it would not be easy to learn and maintain because, in gambling, one's emotions could escalate easily. This can make him let go of those restrictions slowly and in the end, he uses no restrictions on gambling.