most of the pints that you have listed are very valid, but i feel that there is meeting that is missing which is greed, or is greed not also a bad habit that usually cost gamblers a whole lot in gambling?
I think that its even the most dangerous habit and that is probably what the OP meant by his fourth point. You can never mention deadly habit in gambling without adding this to the list even though majority of gamblers are guilty of this.
Greed is also mistaken for aiming high or dreaming big but realistically it is not good at all and as players, its better to settle this habit before even coming into gambling. Anyone that is greedy will definitely have problems in gambling because gambling on its own has a way of making responsible people become greedy and it takes discipline to overcome this and then it becomes even more difficult for those who are by default naturally greedy.