If you dont have discipline then most likely you will fail.
Discipline has no link to gambling.
you don't gamble with discipline. That would mean you intend to have a strategy and to win.
You can't have a strategy. it's useless.
Gambling is for the fun of it! For the thrills and how you wish to hit that button again
You can discipline yourself mentally to only gamble with a certain amount of money per week.
Gambling is fine as long as you set yourself limits.